31103022131 has 2 divisors, whose sum is σ = 31103022132. Its totient is φ = 31103022130.

The previous prime is 31103022127. The next prime is 31103022133. The reversal of 31103022131 is 13122030113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31103022131 - 2² = 31103022127 is a prime.

It is a super-2 number, since 2×31103022131² (a number of 22 digits) contains 22 as substring.

Together with 31103022133, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31103022133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15551511065 + 15551511066.

It is an arithmetic number, because the mean of its divisors is an integer number (15551511066).

Almost surely, 2^31103022131 is an apocalyptic number.

31103022131 is a deficient number, since it is larger than the sum of its proper divisors (1).

31103022131 is an equidigital number, since it uses as much as digits as its factorization.

31103022131 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 31103022131 its reverse (13122030113), we get a palindrome (44225052244).

The spelling of 31103022131 in words is "thirty-one billion, one hundred three million, twenty-two thousand, one hundred thirty-one".