57111062100021 has 10 divisors (see below), whose sum is σ = 85314055729782. Its totient is φ = 38074041399960.

The previous prime is 57111062100019. The next prime is 57111062100049. The reversal of 57111062100021 is 12000126011175.

57111062100021 is a `hidden beast` number, since 5 + 7 + 1 + 1 + 10 + 621 + 0 + 0 + 0 + 21 = 666.

57111062100021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 37107761124996 + 20003300975025 = 6091614^2 + 4472505^2 .

It is not a de Polignac number, because 57111062100021 - 2¹ = 57111062100019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57111062100721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 352537420290 + ... + 352537420451.

Almost surely, 2^{57111062100021} is an apocalyptic number.

It is an amenable number.

57111062100021 is a deficient number, since it is larger than the sum of its proper divisors (28202993629761).

57111062100021 is an equidigital number, since it uses as much as digits as its factorization.

57111062100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705074840753 (or 705074840744 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 27.

Adding to 57111062100021 its reverse (12000126011175), we get a palindrome (69111188111196).

The spelling of 57111062100021 in words is "fifty-seven trillion, one hundred eleven billion, sixty-two million, one hundred thousand, twenty-one".