31130112321 has 128 divisors (see below), whose sum is σ = 60105830400. Its totient is φ = 15449978880.

The previous prime is 31130112229. The next prime is 31130112323. The reversal of 31130112321 is 12321103113.

31130112321 is a `hidden beast` number, since 31 + 1 + 301 + 12 + 321 = 666.

It is not a de Polignac number, because 31130112321 - 2¹⁰ = 31130111297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31130112294 and 31130112303.

It is not an unprimeable number, because it can be changed into a prime (31130112323) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5845566 + ... + 5850888.

It is an arithmetic number, because the mean of its divisors is an integer number (469576800).

Almost surely, 2^31130112321 is an apocalyptic number.

It is an amenable number.

31130112321 is a deficient number, since it is larger than the sum of its proper divisors (28975718079).

31130112321 is a wasteful number, since it uses less digits than its factorization.

31130112321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5476 (or 5470 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 31130112321 its reverse (12321103113), we get a palindrome (43451215434).

The spelling of 31130112321 in words is "thirty-one billion, one hundred thirty million, one hundred twelve thousand, three hundred twenty-one".