331020012077 has 2 divisors, whose sum is σ = 331020012078. Its totient is φ = 331020012076.

The previous prime is 331020012073. The next prime is 331020012083. The reversal of 331020012077 is 770210020133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 256042072036 + 74977940041 = 506006^2 + 273821^2 .

It is a cyclic number.

It is not a de Polignac number, because 331020012077 - 2² = 331020012073 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331020012073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165510006038 + 165510006039.

It is an arithmetic number, because the mean of its divisors is an integer number (165510006039).

Almost surely, 2^331020012077 is an apocalyptic number.

It is an amenable number.

331020012077 is a deficient number, since it is larger than the sum of its proper divisors (1).

331020012077 is an equidigital number, since it uses as much as digits as its factorization.

331020012077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 26.

The spelling of 331020012077 in words is "three hundred thirty-one billion, twenty million, twelve thousand, seventy-seven".