31011120131 has 2 divisors, whose sum is σ = 31011120132. Its totient is φ = 31011120130.

The previous prime is 31011120121. The next prime is 31011120143. The reversal of 31011120131 is 13102111013.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (13102111013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31011120131 - 2¹⁸ = 31010857987 is a prime.

It is a super-2 number, since 2×31011120131² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31011120121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15505560065 + 15505560066.

It is an arithmetic number, because the mean of its divisors is an integer number (15505560066).

Almost surely, 2^31011120131 is an apocalyptic number.

31011120131 is a deficient number, since it is larger than the sum of its proper divisors (1).

31011120131 is an equidigital number, since it uses as much as digits as its factorization.

31011120131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 31011120131 its reverse (13102111013), we get a palindrome (44113231144).

The spelling of 31011120131 in words is "thirty-one billion, eleven million, one hundred twenty thousand, one hundred thirty-one".