12757021057 has 16 divisors (see below), whose sum is σ = 14071075200. Its totient is φ = 11468874240.

The previous prime is 12757020961. The next prime is 12757021127. The reversal of 12757021057 is 75012075721.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12757021057 is a prime.

It is a super-3 number, since 3×12757021057³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12757021457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1659619 + ... + 1667287.

It is an arithmetic number, because the mean of its divisors is an integer number (879442200).

Almost surely, 2^12757021057 is an apocalyptic number.

It is an amenable number.

12757021057 is a deficient number, since it is larger than the sum of its proper divisors (1314054143).

12757021057 is a wasteful number, since it uses less digits than its factorization.

12757021057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9336.

The product of its (nonzero) digits is 34300, while the sum is 37.

Adding to 12757021057 its reverse (75012075721), we get a palindrome (87769096778).

The spelling of 12757021057 in words is "twelve billion, seven hundred fifty-seven million, twenty-one thousand, fifty-seven".