111212801113 has 2 divisors, whose sum is σ = 111212801114. Its totient is φ = 111212801112.

The previous prime is 111212801087. The next prime is 111212801197. The reversal of 111212801113 is 311108212111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62666610889 + 48546190224 = 250333^2 + 220332^2 .

It is a cyclic number.

It is not a de Polignac number, because 111212801113 - 2²⁹ = 110675930201 is a prime.

It is not a weakly prime, because it can be changed into another prime (111212801813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55606400556 + 55606400557.

It is an arithmetic number, because the mean of its divisors is an integer number (55606400557).

Almost surely, 2^111212801113 is an apocalyptic number.

It is an amenable number.

111212801113 is a deficient number, since it is larger than the sum of its proper divisors (1).

111212801113 is an equidigital number, since it uses as much as digits as its factorization.

111212801113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 22.

The spelling of 111212801113 in words is "one hundred eleven billion, two hundred twelve million, eight hundred one thousand, one hundred thirteen".