111212132113 has 4 divisors (see below), whose sum is σ = 111213670720. Its totient is φ = 111210593508.

The previous prime is 111212132081. The next prime is 111212132173. The reversal of 111212132113 is 311231212111.

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 111212132113 - 2⁵ = 111212132081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111212132173) 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, 655245 + ... + 807322.

It is an arithmetic number, because the mean of its divisors is an integer number (27803417680).

Almost surely, 2^111212132113 is an apocalyptic number.

It is an amenable number.

111212132113 is a deficient number, since it is larger than the sum of its proper divisors (1538607).

111212132113 is an equidigital number, since it uses as much as digits as its factorization.

111212132113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1538606.

The product of its digits is 72, while the sum is 19.

Adding to 111212132113 its reverse (311231212111), we get a palindrome (422443344224).

The spelling of 111212132113 in words is "one hundred eleven billion, two hundred twelve million, one hundred thirty-two thousand, one hundred thirteen".