31321013321903 has 2 divisors, whose sum is σ = 31321013321904. Its totient is φ = 31321013321902.

The previous prime is 31321013321887. The next prime is 31321013321951. The reversal of 31321013321903 is 30912331012313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31321013321903 - 2⁴ = 31321013321887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31321013321903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31321013341903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660506660951 + 15660506660952.

It is an arithmetic number, because the mean of its divisors is an integer number (15660506660952).

Almost surely, 2^{31321013321903} is an apocalyptic number.

31321013321903 is a deficient number, since it is larger than the sum of its proper divisors (1).

31321013321903 is an equidigital number, since it uses as much as digits as its factorization.

31321013321903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748, while the sum is 32.

The spelling of 31321013321903 in words is "thirty-one trillion, three hundred twenty-one billion, thirteen million, three hundred twenty-one thousand, nine hundred three".