231221320332371 has 2 divisors, whose sum is σ = 231221320332372. Its totient is φ = 231221320332370.

The previous prime is 231221320332323. The next prime is 231221320332377. The reversal of 231221320332371 is 173233023122132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231221320332371 - 2⁴⁶ = 160852576154707 is a prime.

It is not a weakly prime, because it can be changed into another prime (231221320332377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115610660166185 + 115610660166186.

It is an arithmetic number, because the mean of its divisors is an integer number (115610660166186).

Almost surely, 2^{231221320332371} is an apocalyptic number.

231221320332371 is a deficient number, since it is larger than the sum of its proper divisors (1).

231221320332371 is an equidigital number, since it uses as much as digits as its factorization.

231221320332371 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 35.

The spelling of 231221320332371 in words is "two hundred thirty-one trillion, two hundred twenty-one billion, three hundred twenty million, three hundred thirty-two thousand, three hundred seventy-one".