57557142121 has 2 divisors, whose sum is σ = 57557142122. Its totient is φ = 57557142120.

The previous prime is 57557142119. The next prime is 57557142151. The reversal of 57557142121 is 12124175575.

57557142121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49246267225 + 8310874896 = 221915^2 + 91164^2 .

It is a cyclic number.

It is not a de Polignac number, because 57557142121 - 2¹ = 57557142119 is a prime.

Together with 57557142119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (57557142151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28778571060 + 28778571061.

It is an arithmetic number, because the mean of its divisors is an integer number (28778571061).

Almost surely, 2^57557142121 is an apocalyptic number.

It is an amenable number.

57557142121 is a deficient number, since it is larger than the sum of its proper divisors (1).

57557142121 is an equidigital number, since it uses as much as digits as its factorization.

57557142121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 98000, while the sum is 40.

The spelling of 57557142121 in words is "fifty-seven billion, five hundred fifty-seven million, one hundred forty-two thousand, one hundred twenty-one".