31231012031113 has 8 divisors (see below), whose sum is σ = 31553309901960. Its totient is φ = 30909364611840.

The previous prime is 31231012031111. The next prime is 31231012031161. The reversal of 31231012031113 is 31113021013213.

It can be written as a sum of positive squares in 4 ways, for example, as 1246768761744 + 29984243269369 = 1116588^2 + 5475787^2 .

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 31231012031113 - 2¹ = 31231012031111 is a prime.

It is a super-2 number, since 2×31231012031113² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31231012031111) 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, 162516370 + ... + 162708427.

It is an arithmetic number, because the mean of its divisors is an integer number (3944163737745).

Almost surely, 2^{31231012031113} is an apocalyptic number.

It is an amenable number.

31231012031113 is a deficient number, since it is larger than the sum of its proper divisors (322297870847).

31231012031113 is a wasteful number, since it uses less digits than its factorization.

31231012031113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325225787.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 31231012031113 its reverse (31113021013213), we get a palindrome (62344033044326).

The spelling of 31231012031113 in words is "thirty-one trillion, two hundred thirty-one billion, twelve million, thirty-one thousand, one hundred thirteen".