52056621121621 has 2 divisors, whose sum is σ = 52056621121622. Its totient is φ = 52056621121620.

The previous prime is 52056621121601. The next prime is 52056621121639. The reversal of 52056621121621 is 12612112665025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35085838288900 + 16970782832721 = 5923330^2 + 4119561^2 .

It is a cyclic number.

It is not a de Polignac number, because 52056621121621 - 2⁷ = 52056621121493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52056621121601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26028310560810 + 26028310560811.

It is an arithmetic number, because the mean of its divisors is an integer number (26028310560811).

Almost surely, 2^{52056621121621} is an apocalyptic number.

It is an amenable number.

52056621121621 is a deficient number, since it is larger than the sum of its proper divisors (1).

52056621121621 is an equidigital number, since it uses as much as digits as its factorization.

52056621121621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 40.

Adding to 52056621121621 its reverse (12612112665025), we get a palindrome (64668733786646).

The spelling of 52056621121621 in words is "fifty-two trillion, fifty-six billion, six hundred twenty-one million, one hundred twenty-one thousand, six hundred twenty-one".