21002200122131 has 2 divisors, whose sum is σ = 21002200122132. Its totient is φ = 21002200122130.

The previous prime is 21002200122083. The next prime is 21002200122139. The reversal of 21002200122131 is 13122100220012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21002200122131 - 2¹⁸ = 21002199859987 is a prime.

It is a super-2 number, since 2×21002200122131² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21002200122139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501100061065 + 10501100061066.

It is an arithmetic number, because the mean of its divisors is an integer number (10501100061066).

Almost surely, 2^{21002200122131} is an apocalyptic number.

21002200122131 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002200122131 is an equidigital number, since it uses as much as digits as its factorization.

21002200122131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21002200122131 its reverse (13122100220012), we get a palindrome (34124300342143).

The spelling of 21002200122131 in words is "twenty-one trillion, two billion, two hundred million, one hundred twenty-two thousand, one hundred thirty-one".