31321322312387 has 2 divisors, whose sum is σ = 31321322312388. Its totient is φ = 31321322312386.

The previous prime is 31321322312303. The next prime is 31321322312389. The reversal of 31321322312387 is 78321322312313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31321322312387 - 2¹⁴ = 31321322296003 is a prime.

Together with 31321322312389, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31321322312389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660661156193 + 15660661156194.

It is an arithmetic number, because the mean of its divisors is an integer number (15660661156194).

Almost surely, 2^{31321322312387} is an apocalyptic number.

31321322312387 is a deficient number, since it is larger than the sum of its proper divisors (1).

31321322312387 is an equidigital number, since it uses as much as digits as its factorization.

31321322312387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 41.

The spelling of 31321322312387 in words is "thirty-one trillion, three hundred twenty-one billion, three hundred twenty-two million, three hundred twelve thousand, three hundred eighty-seven".