111312110321 has 4 divisors (see below), whose sum is σ = 111877146612. Its totient is φ = 110747074032.

The previous prime is 111312110303. The next prime is 111312110369. The reversal of 111312110321 is 123011213111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123011213111 = 1721 ⋅71476591.

It can be written as a sum of positive squares in 2 ways, for example, as 50643001600 + 60669108721 = 225040^2 + 246311^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111312110321 is a prime.

It is a super-2 number, since 2×111312110321² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111312110321.

It is not an unprimeable number, because it can be changed into a prime (111312110521) 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, 282517850 + ... + 282518243.

It is an arithmetic number, because the mean of its divisors is an integer number (27969286653).

Almost surely, 2^111312110321 is an apocalyptic number.

It is an amenable number.

111312110321 is a deficient number, since it is larger than the sum of its proper divisors (565036291).

111312110321 is an equidigital number, since it uses as much as digits as its factorization.

111312110321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565036290.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 111312110321 its reverse (123011213111), we get a palindrome (234323323432).

The spelling of 111312110321 in words is "one hundred eleven billion, three hundred twelve million, one hundred ten thousand, three hundred twenty-one".