111210122112013 has 4 divisors (see below), whose sum is σ = 111210260185948. Its totient is φ = 111209984038080.

The previous prime is 111210122111999. The next prime is 111210122112017. The reversal of 111210122112013 is 310211221012111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66456457238889 + 44753664873124 = 8152083^2 + 6689818^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111210122112013 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 (111210122112017) 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, 67821678 + ... + 69442063.

It is an arithmetic number, because the mean of its divisors is an integer number (27802565046487).

Almost surely, 2^{111210122112013} is an apocalyptic number.

It is an amenable number.

111210122112013 is a deficient number, since it is larger than the sum of its proper divisors (138073935).

111210122112013 is an equidigital number, since it uses as much as digits as its factorization.

111210122112013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138073934.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 111210122112013 its reverse (310211221012111), we get a palindrome (421421343124124).

The spelling of 111210122112013 in words is "one hundred eleven trillion, two hundred ten billion, one hundred twenty-two million, one hundred twelve thousand, thirteen".