31321021311311 has 2 divisors, whose sum is σ = 31321021311312. Its totient is φ = 31321021311310.

The previous prime is 31321021311227. The next prime is 31321021311319. The reversal of 31321021311311 is 11311312012313.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31321021311311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31321021311319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660510655655 + 15660510655656.

It is an arithmetic number, because the mean of its divisors is an integer number (15660510655656).

Almost surely, 2^{31321021311311} is an apocalyptic number.

31321021311311 is a deficient number, since it is larger than the sum of its proper divisors (1).

31321021311311 is an equidigital number, since it uses as much as digits as its factorization.

31321021311311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 23.

Adding to 31321021311311 its reverse (11311312012313), we get a palindrome (42632333323624).

The spelling of 31321021311311 in words is "thirty-one trillion, three hundred twenty-one billion, twenty-one million, three hundred eleven thousand, three hundred eleven".