56212246021 has 2 divisors, whose sum is σ = 56212246022. Its totient is φ = 56212246020.

The previous prime is 56212246001. The next prime is 56212246033. The reversal of 56212246021 is 12064221265.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55877868225 + 334377796 = 236385^2 + 18286^2 .

It is a cyclic number.

It is not a de Polignac number, because 56212246021 - 2⁵ = 56212245989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56212246001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28106123010 + 28106123011.

It is an arithmetic number, because the mean of its divisors is an integer number (28106123011).

Almost surely, 2^56212246021 is an apocalyptic number.

It is an amenable number.

56212246021 is a deficient number, since it is larger than the sum of its proper divisors (1).

56212246021 is an equidigital number, since it uses as much as digits as its factorization.

56212246021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 56212246021 its reverse (12064221265), we get a palindrome (68276467286).

The spelling of 56212246021 in words is "fifty-six billion, two hundred twelve million, two hundred forty-six thousand, twenty-one".