57112051221 has 12 divisors (see below), whose sum is σ = 82503168748. Its totient is φ = 38071016064.

The previous prime is 57112051211. The next prime is 57112051231. The reversal of 57112051221 is 12215021175.

57112051221 is a `hidden beast` number, since 5 + 7 + 1 + 120 + 512 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (57112051211) and next prime (57112051231).

It can be written as a sum of positive squares in 2 ways, for example, as 23237648721 + 33874402500 = 152439^2 + 184050^2 .

It is not a de Polignac number, because 57112051221 - 2¹³ = 57112043029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57112051211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 207190 + ... + 396423.

Almost surely, 2^57112051221 is an apocalyptic number.

It is an amenable number.

57112051221 is a deficient number, since it is larger than the sum of its proper divisors (25391117527).

57112051221 is a wasteful number, since it uses less digits than its factorization.

57112051221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614132 (or 614129 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 27.

Adding to 57112051221 its reverse (12215021175), we get a palindrome (69327072396).

The spelling of 57112051221 in words is "fifty-seven billion, one hundred twelve million, fifty-one thousand, two hundred twenty-one".