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221111121132101 = 1391590727490159
BaseRepresentation
bin110010010001100101110001…
…110101001011101001000101
31001222220000110012112101012102
4302101211301311023221011
5212440141034002211401
62102133014033401445
764400515464204554
oct6221456165135105
91058800405471172
10221111121132101
11644a8777584542
1220970997109285
13964b8c63a7805
143c85b9a34bd9b
151a8691ade156b
hexc91971d4ba45

221111121132101 has 4 divisors (see below), whose sum is σ = 222701848622400. Its totient is φ = 219520393641804.

The previous prime is 221111121132079. The next prime is 221111121132113. The reversal of 221111121132101 is 101231121111122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221111121132101 - 222 = 221111116937797 is a prime.

It is a super-3 number, since 3×2211111211321013 (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221111121132901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 795363744941 + ... + 795363745218.

It is an arithmetic number, because the mean of its divisors is an integer number (55675462155600).

Almost surely, 2221111121132101 is an apocalyptic number.

It is an amenable number.

221111121132101 is a deficient number, since it is larger than the sum of its proper divisors (1590727490299).

221111121132101 is a wasteful number, since it uses less digits than its factorization.

221111121132101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590727490298.

The product of its (nonzero) digits is 48, while the sum is 20.

Adding to 221111121132101 its reverse (101231121111122), we get a palindrome (322342242243223).

The spelling of 221111121132101 in words is "two hundred twenty-one trillion, one hundred eleven billion, one hundred twenty-one million, one hundred thirty-two thousand, one hundred one".

Divisors: 1 139 1590727490159 221111121132101