111312302131 has 4 divisors (see below), whose sum is σ = 112113110200. Its totient is φ = 110511494064.

The previous prime is 111312302099. The next prime is 111312302147. The reversal of 111312302131 is 131203213111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131203213111 = 19 ⋅6905432269.

It is a cyclic number.

It is not a de Polignac number, because 111312302131 - 2⁵ = 111312302099 is a prime.

It is a super-2 number, since 2×111312302131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111312302099 and 111312302108.

It is not an unprimeable number, because it can be changed into a prime (111312302191) 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, 400403826 + ... + 400404103.

It is an arithmetic number, because the mean of its divisors is an integer number (28028277550).

Almost surely, 2^111312302131 is an apocalyptic number.

111312302131 is a deficient number, since it is larger than the sum of its proper divisors (800808069).

111312302131 is an equidigital number, since it uses as much as digits as its factorization.

111312302131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800808068.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 111312302131 its reverse (131203213111), we get a palindrome (242515515242).

The spelling of 111312302131 in words is "one hundred eleven billion, three hundred twelve million, three hundred two thousand, one hundred thirty-one".