31231131230131 has 16 divisors (see below), whose sum is σ = 36366547084480. Its totient is φ = 26266317742080.

The previous prime is 31231131230071. The next prime is 31231131230137. The reversal of 31231131230131 is 13103213113213.

It is a cyclic number.

It is not a de Polignac number, because 31231131230131 - 2²⁷ = 31230997012403 is a prime.

It is a super-2 number, since 2×31231131230131² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31231131230096 and 31231131230105.

It is not an unprimeable number, because it can be changed into a prime (31231131230137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89239566 + ... + 89588851.

It is an arithmetic number, because the mean of its divisors is an integer number (2272909192780).

Almost surely, 2^{31231131230131} is an apocalyptic number.

31231131230131 is a deficient number, since it is larger than the sum of its proper divisors (5135415854349).

31231131230131 is a wasteful number, since it uses less digits than its factorization.

31231131230131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178828894.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 31231131230131 its reverse (13103213113213), we get a palindrome (44334344343344).

The spelling of 31231131230131 in words is "thirty-one trillion, two hundred thirty-one billion, one hundred thirty-one million, two hundred thirty thousand, one hundred thirty-one".