31120111213031 has 8 divisors (see below), whose sum is σ = 31489814225760. Its totient is φ = 30751939062432.

The previous prime is 31120111213027. The next prime is 31120111213057. The reversal of 31120111213031 is 13031211102113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31120111213031 - 2² = 31120111213027 is a prime.

It is a super-2 number, since 2×31120111213031² (a number of 28 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 = 31120111212994 and 31120111213012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31120111213001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 382674635 + ... + 382755948.

It is an arithmetic number, because the mean of its divisors is an integer number (3936226778220).

Almost surely, 2^{31120111213031} is an apocalyptic number.

31120111213031 is a deficient number, since it is larger than the sum of its proper divisors (369703012729).

31120111213031 is a wasteful number, since it uses less digits than its factorization.

31120111213031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765431065.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 31120111213031 its reverse (13031211102113), we get a palindrome (44151322315144).

The spelling of 31120111213031 in words is "thirty-one trillion, one hundred twenty billion, one hundred eleven million, two hundred thirteen thousand, thirty-one".