31223132911 has 2 divisors, whose sum is σ = 31223132912. Its totient is φ = 31223132910.

The previous prime is 31223132879. The next prime is 31223132929. The reversal of 31223132911 is 11923132213.

It is a strong prime.

It is an emirp because it is prime and its reverse (11923132213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31223132911 - 2⁵ = 31223132879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31223132911.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31223138911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15611566455 + 15611566456.

It is an arithmetic number, because the mean of its divisors is an integer number (15611566456).

Almost surely, 2^31223132911 is an apocalyptic number.

31223132911 is a deficient number, since it is larger than the sum of its proper divisors (1).

31223132911 is an equidigital number, since it uses as much as digits as its factorization.

31223132911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 28.

The spelling of 31223132911 in words is "thirty-one billion, two hundred twenty-three million, one hundred thirty-two thousand, nine hundred eleven".