321331232977 has 2 divisors, whose sum is σ = 321331232978. Its totient is φ = 321331232976.

The previous prime is 321331232941. The next prime is 321331233001. The reversal of 321331232977 is 779232133123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 256019808256 + 65311424721 = 505984^2 + 255561^2 .

It is a cyclic number.

It is not a de Polignac number, because 321331232977 - 2³⁵ = 286971494609 is a prime.

It is a super-2 number, since 2×321331232977² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (321331232377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160665616488 + 160665616489.

It is an arithmetic number, because the mean of its divisors is an integer number (160665616489).

Almost surely, 2^321331232977 is an apocalyptic number.

It is an amenable number.

321331232977 is a deficient number, since it is larger than the sum of its proper divisors (1).

321331232977 is an equidigital number, since it uses as much as digits as its factorization.

321331232977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 285768, while the sum is 43.

The spelling of 321331232977 in words is "three hundred twenty-one billion, three hundred thirty-one million, two hundred thirty-two thousand, nine hundred seventy-seven".