11057757021 has 12 divisors (see below), whose sum is σ = 15976284480. Its totient is φ = 7370006280.

The previous prime is 11057757017. The next prime is 11057757037. The reversal of 11057757021 is 12075775011.

11057757021 is a `hidden beast` number, since 1 + 10 + 5 + 77 + 570 + 2 + 1 = 666.

It is not a de Polignac number, because 11057757021 - 2² = 11057757017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11057757421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113895 + ... + 187316.

It is an arithmetic number, because the mean of its divisors is an integer number (1331357040).

Almost surely, 2^11057757021 is an apocalyptic number.

It is an amenable number.

11057757021 is a deficient number, since it is larger than the sum of its proper divisors (4918527459).

11057757021 is a wasteful number, since it uses less digits than its factorization.

11057757021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305296 (or 305293 counting only the distinct ones).

The product of its (nonzero) digits is 17150, while the sum is 36.

The spelling of 11057757021 in words is "eleven billion, fifty-seven million, seven hundred fifty-seven thousand, twenty-one".