57375111221 has 2 divisors, whose sum is σ = 57375111222. Its totient is φ = 57375111220.

The previous prime is 57375111187. The next prime is 57375111223. The reversal of 57375111221 is 12211157375.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32755932196 + 24619179025 = 180986^2 + 156905^2 .

It is a cyclic number.

It is not a de Polignac number, because 57375111221 - 2²⁶ = 57308002357 is a prime.

It is a super-2 number, since 2×57375111221² (a number of 22 digits) contains 22 as substring.

Together with 57375111223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57375111223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28687555610 + 28687555611.

It is an arithmetic number, because the mean of its divisors is an integer number (28687555611).

Almost surely, 2^57375111221 is an apocalyptic number.

It is an amenable number.

57375111221 is a deficient number, since it is larger than the sum of its proper divisors (1).

57375111221 is an equidigital number, since it uses as much as digits as its factorization.

57375111221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14700, while the sum is 35.

Adding to 57375111221 its reverse (12211157375), we get a palindrome (69586268596).

The spelling of 57375111221 in words is "fifty-seven billion, three hundred seventy-five million, one hundred eleven thousand, two hundred twenty-one".