321131332320947 has 2 divisors, whose sum is σ = 321131332320948. Its totient is φ = 321131332320946.

The previous prime is 321131332320919. The next prime is 321131332321001. The reversal of 321131332320947 is 749023233131123.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321131332320947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321131332320898 and 321131332320907.

It is not a weakly prime, because it can be changed into another prime (321131332320917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160565666160473 + 160565666160474.

It is an arithmetic number, because the mean of its divisors is an integer number (160565666160474).

Almost surely, 2^{321131332320947} is an apocalyptic number.

321131332320947 is a deficient number, since it is larger than the sum of its proper divisors (1).

321131332320947 is an equidigital number, since it uses as much as digits as its factorization.

321131332320947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 44.

The spelling of 321131332320947 in words is "three hundred twenty-one trillion, one hundred thirty-one billion, three hundred thirty-two million, three hundred twenty thousand, nine hundred forty-seven".