331201221311977 has 2 divisors, whose sum is σ = 331201221311978. Its totient is φ = 331201221311976.

The previous prime is 331201221311927. The next prime is 331201221312079. The reversal of 331201221311977 is 779113122102133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 303429364762176 + 27771856549801 = 17419224^2 + 5269901^2 .

It is a cyclic number.

It is not a de Polignac number, because 331201221311977 - 2⁴⁷ = 190463732956649 is a prime.

It is not a weakly prime, because it can be changed into another prime (331201221311927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165600610655988 + 165600610655989.

It is an arithmetic number, because the mean of its divisors is an integer number (165600610655989).

Almost surely, 2^{331201221311977} is an apocalyptic number.

It is an amenable number.

331201221311977 is a deficient number, since it is larger than the sum of its proper divisors (1).

331201221311977 is an equidigital number, since it uses as much as digits as its factorization.

331201221311977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 43.

The spelling of 331201221311977 in words is "three hundred thirty-one trillion, two hundred one billion, two hundred twenty-one million, three hundred eleven thousand, nine hundred seventy-seven".