111122200013921 has 2 divisors, whose sum is σ = 111122200013922. Its totient is φ = 111122200013920.

The previous prime is 111122200013911. The next prime is 111122200013939. The reversal of 111122200013921 is 129310002221111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79136841100321 + 31985358913600 = 8895889^2 + 5655560^2 .

It is an emirp because it is prime and its reverse (129310002221111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111122200013921 is a prime.

It is not a weakly prime, because it can be changed into another prime (111122200013911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55561100006960 + 55561100006961.

It is an arithmetic number, because the mean of its divisors is an integer number (55561100006961).

Almost surely, 2^{111122200013921} is an apocalyptic number.

It is an amenable number.

111122200013921 is a deficient number, since it is larger than the sum of its proper divisors (1).

111122200013921 is an equidigital number, since it uses as much as digits as its factorization.

111122200013921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 26.

The spelling of 111122200013921 in words is "one hundred eleven trillion, one hundred twenty-two billion, two hundred million, thirteen thousand, nine hundred twenty-one".