21122210297 has 2 divisors, whose sum is σ = 21122210298. Its totient is φ = 21122210296.

The previous prime is 21122210209. The next prime is 21122210321. The reversal of 21122210297 is 79201222112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20952273001 + 169937296 = 144749^2 + 13036^2 .

It is a cyclic number.

It is not a de Polignac number, because 21122210297 - 2¹⁶ = 21122144761 is a prime.

It is a super-2 number, since 2×21122210297² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21122210797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561105148 + 10561105149.

It is an arithmetic number, because the mean of its divisors is an integer number (10561105149).

Almost surely, 2^21122210297 is an apocalyptic number.

It is an amenable number.

21122210297 is a deficient number, since it is larger than the sum of its proper divisors (1).

21122210297 is an equidigital number, since it uses as much as digits as its factorization.

21122210297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 29.

The spelling of 21122210297 in words is "twenty-one billion, one hundred twenty-two million, two hundred ten thousand, two hundred ninety-seven".