57120566611221 has 24 divisors (see below), whose sum is σ = 82739120946560. Its totient is φ = 37973536226496.

The previous prime is 57120566611211. The next prime is 57120566611249. The reversal of 57120566611221 is 12211666502175.

It is not a de Polignac number, because 57120566611221 - 2¹⁷ = 57120566480149 is a prime.

It is a super-2 number, since 2×57120566611221² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57120566611211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7381266 + ... + 12989388.

Almost surely, 2^{57120566611221} is an apocalyptic number.

It is an amenable number.

57120566611221 is a deficient number, since it is larger than the sum of its proper divisors (25618554335339).

57120566611221 is a wasteful number, since it uses less digits than its factorization.

57120566611221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5611305 (or 5611302 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The spelling of 57120566611221 in words is "fifty-seven trillion, one hundred twenty billion, five hundred sixty-six million, six hundred eleven thousand, two hundred twenty-one".