31232012131 has 2 divisors, whose sum is σ = 31232012132. Its totient is φ = 31232012130.

The previous prime is 31232012129. The next prime is 31232012183. The reversal of 31232012131 is 13121023213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31232012131 - 2¹ = 31232012129 is a prime.

It is a super-2 number, since 2×31232012131² (a number of 22 digits) contains 22 as substring.

Together with 31232012129, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 31232012099 and 31232012108.

It is not a weakly prime, because it can be changed into another prime (31232012101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15616006065 + 15616006066.

It is an arithmetic number, because the mean of its divisors is an integer number (15616006066).

Almost surely, 2^31232012131 is an apocalyptic number.

31232012131 is a deficient number, since it is larger than the sum of its proper divisors (1).

31232012131 is an equidigital number, since it uses as much as digits as its factorization.

31232012131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31232012131 its reverse (13121023213), we get a palindrome (44353035344).

The spelling of 31232012131 in words is "thirty-one billion, two hundred thirty-two million, twelve thousand, one hundred thirty-one".