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1211220011101 = 3163382933927
BaseRepresentation
bin10001101000000010010…
…101101010100001011101
311021210101000010201201011
4101220002111222201131
5124321034310323401
62324232104215221
7153336106136452
oct21500225524135
94253330121634
101211220011101
11427748135541
121768ab16a511
138a2a9c84b29
14428a2709829
152178ec38451
hex11a0256a85d

1211220011101 has 4 divisors (see below), whose sum is σ = 1211602948192. Its totient is φ = 1210837074012.

The previous prime is 1211220011077. The next prime is 1211220011117. The reversal of 1211220011101 is 1011100221121.

It is a happy number.

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 1211220011101 - 227 = 1211085793373 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 (1211220011161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191463801 + ... + 191470126.

It is an arithmetic number, because the mean of its divisors is an integer number (302900737048).

Almost surely, 21211220011101 is an apocalyptic number.

It is an amenable number.

1211220011101 is a deficient number, since it is larger than the sum of its proper divisors (382937091).

1211220011101 is an equidigital number, since it uses as much as digits as its factorization.

1211220011101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382937090.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1211220011101 its reverse (1011100221121), we get a palindrome (2222320232222).

The spelling of 1211220011101 in words is "one trillion, two hundred eleven billion, two hundred twenty million, eleven thousand, one hundred one".

Divisors: 1 3163 382933927 1211220011101