321920040971 has 2 divisors, whose sum is σ = 321920040972. Its totient is φ = 321920040970.

The previous prime is 321920040929. The next prime is 321920041019. The reversal of 321920040971 is 179040029123.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321920040971 - 2⁶ = 321920040907 is a prime.

It is not a weakly prime, because it can be changed into another prime (321920042971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160960020485 + 160960020486.

It is an arithmetic number, because the mean of its divisors is an integer number (160960020486).

Almost surely, 2^321920040971 is an apocalyptic number.

321920040971 is a deficient number, since it is larger than the sum of its proper divisors (1).

321920040971 is an equidigital number, since it uses as much as digits as its factorization.

321920040971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 38.

The spelling of 321920040971 in words is "three hundred twenty-one billion, nine hundred twenty million, forty thousand, nine hundred seventy-one".