31223130302131 has 2 divisors, whose sum is σ = 31223130302132. Its totient is φ = 31223130302130.

The previous prime is 31223130302107. The next prime is 31223130302213. The reversal of 31223130302131 is 13120303132213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31223130302131 - 2⁵ = 31223130302099 is a prime.

It is a super-2 number, since 2×31223130302131² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31223130302096 and 31223130302105.

It is not a weakly prime, because it can be changed into another prime (31223130302531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15611565151065 + 15611565151066.

It is an arithmetic number, because the mean of its divisors is an integer number (15611565151066).

Almost surely, 2^{31223130302131} is an apocalyptic number.

31223130302131 is a deficient number, since it is larger than the sum of its proper divisors (1).

31223130302131 is an equidigital number, since it uses as much as digits as its factorization.

31223130302131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 31223130302131 its reverse (13120303132213), we get a palindrome (44343433434344).

The spelling of 31223130302131 in words is "thirty-one trillion, two hundred twenty-three billion, one hundred thirty million, three hundred two thousand, one hundred thirty-one".