31011001131 has 32 divisors (see below), whose sum is σ = 47221751808. Its totient is φ = 17918699040.

The previous prime is 31011001127. The next prime is 31011001159. The reversal of 31011001131 is 13110011013.

It is not a de Polignac number, because 31011001131 - 2² = 31011001127 is a prime.

It is a super-2 number, since 2×31011001131² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31011001631) 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, 166470 + ... + 299556.

It is an arithmetic number, because the mean of its divisors is an integer number (1475679744).

Almost surely, 2^31011001131 is an apocalyptic number.

31011001131 is a deficient number, since it is larger than the sum of its proper divisors (16210750677).

31011001131 is a wasteful number, since it uses less digits than its factorization.

31011001131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133431.

The product of its (nonzero) digits is 9, while the sum is 12.

Adding to 31011001131 its reverse (13110011013), we get a palindrome (44121012144).

The spelling of 31011001131 in words is "thirty-one billion, eleven million, one thousand, one hundred thirty-one".