221111000121101 has 4 divisors (see below), whose sum is σ = 221111043335712. Its totient is φ = 221110956906492.

The previous prime is 221111000121083. The next prime is 221111000121191. The reversal of 221111000121101 is 101121000111122.

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 221111000121101 - 2²² = 221110995926797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221111000121191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12711671 + ... + 24572516.

It is an arithmetic number, because the mean of its divisors is an integer number (55277760833928).

Almost surely, 2^{221111000121101} is an apocalyptic number.

It is an amenable number.

221111000121101 is a deficient number, since it is larger than the sum of its proper divisors (43214611).

221111000121101 is an equidigital number, since it uses as much as digits as its factorization.

221111000121101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43214610.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 221111000121101 its reverse (101121000111122), we get a palindrome (322232000232223).

The spelling of 221111000121101 in words is "two hundred twenty-one trillion, one hundred eleven billion, one hundred twenty-one thousand, one hundred one".