31330113221311 has 2 divisors, whose sum is σ = 31330113221312. Its totient is φ = 31330113221310.

The previous prime is 31330113221293. The next prime is 31330113221347. The reversal of 31330113221311 is 11312231103313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31330113221311 - 2⁹ = 31330113220799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31330113221611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15665056610655 + 15665056610656.

It is an arithmetic number, because the mean of its divisors is an integer number (15665056610656).

Almost surely, 2^{31330113221311} is an apocalyptic number.

31330113221311 is a deficient number, since it is larger than the sum of its proper divisors (1).

31330113221311 is an equidigital number, since it uses as much as digits as its factorization.

31330113221311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 31330113221311 its reverse (11312231103313), we get a palindrome (42642344324624).

The spelling of 31330113221311 in words is "thirty-one trillion, three hundred thirty billion, one hundred thirteen million, two hundred twenty-one thousand, three hundred eleven".