31101232131 has 12 divisors (see below), whose sum is σ = 47566590552. Its totient is φ = 19514498496.

The previous prime is 31101232103. The next prime is 31101232163. The reversal of 31101232131 is 13123210113.

31101232131 is a `hidden beast` number, since 311 + 0 + 1 + 2 + 321 + 31 = 666.

It is not a de Polignac number, because 31101232131 - 2⁹ = 31101231619 is a prime.

It is a super-2 number, since 2×31101232131² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31101233131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101637861 + ... + 101638166.

It is an arithmetic number, because the mean of its divisors is an integer number (3963882546).

Almost surely, 2^31101232131 is an apocalyptic number.

31101232131 is a deficient number, since it is larger than the sum of its proper divisors (16465358421).

31101232131 is a wasteful number, since it uses less digits than its factorization.

31101232131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203276050 (or 203276047 counting only the distinct ones).

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

Adding to 31101232131 its reverse (13123210113), we get a palindrome (44224442244).

The spelling of 31101232131 in words is "thirty-one billion, one hundred one million, two hundred thirty-two thousand, one hundred thirty-one".