22121013142897 has 2 divisors, whose sum is σ = 22121013142898. Its totient is φ = 22121013142896.

The previous prime is 22121013142817. The next prime is 22121013143011. The reversal of 22121013142897 is 79824131012122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16405165008241 + 5715848134656 = 4050329^2 + 2390784^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121013142897 - 2⁷ = 22121013142769 is a prime.

It is not a weakly prime, because it can be changed into another prime (22121013142817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060506571448 + 11060506571449.

It is an arithmetic number, because the mean of its divisors is an integer number (11060506571449).

Almost surely, 2^{22121013142897} is an apocalyptic number.

It is an amenable number.

22121013142897 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121013142897 is an equidigital number, since it uses as much as digits as its factorization.

22121013142897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 43.

The spelling of 22121013142897 in words is "twenty-two trillion, one hundred twenty-one billion, thirteen million, one hundred forty-two thousand, eight hundred ninety-seven".