31223130311 has 2 divisors, whose sum is σ = 31223130312. Its totient is φ = 31223130310.

The previous prime is 31223130271. The next prime is 31223130371. The reversal of 31223130311 is 11303132213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31223130311 - 2²⁶ = 31156021447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31223130371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15611565155 + 15611565156.

It is an arithmetic number, because the mean of its divisors is an integer number (15611565156).

Almost surely, 2^31223130311 is an apocalyptic number.

31223130311 is a deficient number, since it is larger than the sum of its proper divisors (1).

31223130311 is an equidigital number, since it uses as much as digits as its factorization.

31223130311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31223130311 its reverse (11303132213), we get a palindrome (42526262524).

The spelling of 31223130311 in words is "thirty-one billion, two hundred twenty-three million, one hundred thirty thousand, three hundred eleven".