31130211131 has 2 divisors, whose sum is σ = 31130211132. Its totient is φ = 31130211130.

The previous prime is 31130211089. The next prime is 31130211137. The reversal of 31130211131 is 13111203113.

It is a strong prime.

It is an emirp because it is prime and its reverse (13111203113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31130211131 - 2¹⁴ = 31130194747 is a prime.

It is a super-2 number, since 2×31130211131² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31130211137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15565105565 + 15565105566.

It is an arithmetic number, because the mean of its divisors is an integer number (15565105566).

Almost surely, 2^31130211131 is an apocalyptic number.

31130211131 is a deficient number, since it is larger than the sum of its proper divisors (1).

31130211131 is an equidigital number, since it uses as much as digits as its factorization.

31130211131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 31130211131 its reverse (13111203113), we get a palindrome (44241414244).

The spelling of 31130211131 in words is "thirty-one billion, one hundred thirty million, two hundred eleven thousand, one hundred thirty-one".