31003212131 has 2 divisors, whose sum is σ = 31003212132. Its totient is φ = 31003212130.

The previous prime is 31003212083. The next prime is 31003212139. The reversal of 31003212131 is 13121230013.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31003212131 - 2¹⁸ = 31002949987 is a prime.

It is a super-2 number, since 2×31003212131² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31003212139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15501606065 + 15501606066.

It is an arithmetic number, because the mean of its divisors is an integer number (15501606066).

Almost surely, 2^31003212131 is an apocalyptic number.

31003212131 is a deficient number, since it is larger than the sum of its proper divisors (1).

31003212131 is an equidigital number, since it uses as much as digits as its factorization.

31003212131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31003212131 its reverse (13121230013), we get a palindrome (44124442144).

The spelling of 31003212131 in words is "thirty-one billion, three million, two hundred twelve thousand, one hundred thirty-one".