321131331012187 has 2 divisors, whose sum is σ = 321131331012188. Its totient is φ = 321131331012186.

The previous prime is 321131331012169. The next prime is 321131331012221. The reversal of 321131331012187 is 781210133131123.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321131331012187 is a prime.

It is not a weakly prime, because it can be changed into another prime (321131331018187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160565665506093 + 160565665506094.

It is an arithmetic number, because the mean of its divisors is an integer number (160565665506094).

Almost surely, 2^{321131331012187} is an apocalyptic number.

321131331012187 is a deficient number, since it is larger than the sum of its proper divisors (1).

321131331012187 is an equidigital number, since it uses as much as digits as its factorization.

321131331012187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 321131331012187 in words is "three hundred twenty-one trillion, one hundred thirty-one billion, three hundred thirty-one million, twelve thousand, one hundred eighty-seven".