31113113321 has 4 divisors (see below), whose sum is σ = 31487970192. Its totient is φ = 30738256452.

The previous prime is 31113113299. The next prime is 31113113351. The reversal of 31113113321 is 12331131113.

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 31113113321 - 2³⁴ = 13933244137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31113113293 and 31113113302.

It is not an unprimeable number, because it can be changed into a prime (31113113351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187428311 + ... + 187428476.

It is an arithmetic number, because the mean of its divisors is an integer number (7871992548).

Almost surely, 2^31113113321 is an apocalyptic number.

It is an amenable number.

31113113321 is a deficient number, since it is larger than the sum of its proper divisors (374856871).

31113113321 is an equidigital number, since it uses as much as digits as its factorization.

31113113321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374856870.

The product of its digits is 162, while the sum is 20.

Adding to 31113113321 its reverse (12331131113), we get a palindrome (43444244434).

The spelling of 31113113321 in words is "thirty-one billion, one hundred thirteen million, one hundred thirteen thousand, three hundred twenty-one".