31130000121231 has 20 divisors (see below), whose sum is σ = 50730370569384. Its totient is φ = 18866666739600.

The previous prime is 31130000121221. The next prime is 31130000121239. The reversal of 31130000121231 is 13212100003113.

31130000121231 is a `hidden beast` number, since 3 + 11 + 300 + 0 + 0 + 121 + 231 = 666.

It is not a de Polignac number, because 31130000121231 - 2²¹ = 31129998024079 is a prime.

It is a super-2 number, since 2×31130000121231² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31130000121239) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17469134980 + ... + 17469136761.

Almost surely, 2^{31130000121231} is an apocalyptic number.

31130000121231 is a deficient number, since it is larger than the sum of its proper divisors (19600370448153).

31130000121231 is a wasteful number, since it uses less digits than its factorization.

31130000121231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34938271764 (or 34938271755 counting only the distinct ones).

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

Adding to 31130000121231 its reverse (13212100003113), we get a palindrome (44342100124344).

The spelling of 31130000121231 in words is "thirty-one trillion, one hundred thirty billion, one hundred twenty-one thousand, two hundred thirty-one".