31013021211131 has 32 divisors (see below), whose sum is σ = 32756085922560. Its totient is φ = 29323407974400.

The previous prime is 31013021211083. The next prime is 31013021211169. The reversal of 31013021211131 is 13111212031013.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31013021211131 is a prime.

It is a super-2 number, since 2×31013021211131² (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 (31013021231131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3098508455 + ... + 3098518463.

It is an arithmetic number, because the mean of its divisors is an integer number (1023627685080).

Almost surely, 2^{31013021211131} is an apocalyptic number.

31013021211131 is a deficient number, since it is larger than the sum of its proper divisors (1743064711429).

31013021211131 is a wasteful number, since it uses less digits than its factorization.

31013021211131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17895.

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

Adding to 31013021211131 its reverse (13111212031013), we get a palindrome (44124233242144).

The spelling of 31013021211131 in words is "thirty-one trillion, thirteen billion, twenty-one million, two hundred eleven thousand, one hundred thirty-one".