57020226019921 has 2 divisors, whose sum is σ = 57020226019922. Its totient is φ = 57020226019920.

The previous prime is 57020226019919. The next prime is 57020226020029. The reversal of 57020226019921 is 12991062202075.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50996951676225 + 6023274343696 = 7141215^2 + 2454236^2 .

It is a cyclic number.

It is not a de Polignac number, because 57020226019921 - 2¹ = 57020226019919 is a prime.

Together with 57020226019919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (57020226019121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28510113009960 + 28510113009961.

It is an arithmetic number, because the mean of its divisors is an integer number (28510113009961).

Almost surely, 2^{57020226019921} is an apocalyptic number.

It is an amenable number.

57020226019921 is a deficient number, since it is larger than the sum of its proper divisors (1).

57020226019921 is an equidigital number, since it uses as much as digits as its factorization.

57020226019921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 57020226019921 in words is "fifty-seven trillion, twenty billion, two hundred twenty-six million, nineteen thousand, nine hundred twenty-one".