2057711021 has 2 divisors, whose sum is σ = 2057711022. Its totient is φ = 2057711020.

The previous prime is 2057711011. The next prime is 2057711027. The reversal of 2057711021 is 1201177502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1083397225 + 974313796 = 32915^2 + 31214^2 .

It is a cyclic number.

It is not a de Polignac number, because 2057711021 - 2²⁶ = 1990602157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2057711027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1028855510 + 1028855511.

It is an arithmetic number, because the mean of its divisors is an integer number (1028855511).

Almost surely, 2^2057711021 is an apocalyptic number.

It is an amenable number.

2057711021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2057711021 is an equidigital number, since it uses as much as digits as its factorization.

2057711021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 980, while the sum is 26.

The square root of 2057711021 is about 45361.9997464838. Note that the first 3 decimals coincide. The cubic root of 2057711021 is about 1271.9248759494.

Adding to 2057711021 its reverse (1201177502), we get a palindrome (3258888523).

The spelling of 2057711021 in words is "two billion, fifty-seven million, seven hundred eleven thousand, twenty-one".