321011057 has 2 divisors, whose sum is σ = 321011058. Its totient is φ = 321011056.

The previous prime is 321011029. The next prime is 321011071. The reversal of 321011057 is 750110123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 174213601 + 146797456 = 13199^2 + 12116^2 .

It is a cyclic number.

It is not a de Polignac number, because 321011057 - 2¹⁸ = 320748913 is a prime.

It is not a weakly prime, because it can be changed into another prime (321011077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160505528 + 160505529.

It is an arithmetic number, because the mean of its divisors is an integer number (160505529).

Almost surely, 2^321011057 is an apocalyptic number.

It is an amenable number.

321011057 is a deficient number, since it is larger than the sum of its proper divisors (1).

321011057 is an equidigital number, since it uses as much as digits as its factorization.

321011057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 321011057 is about 17916.7814352913. The cubic root of 321011057 is about 684.7099892988.

The spelling of 321011057 in words is "three hundred twenty-one million, eleven thousand, fifty-seven".