22121008948697 has 2 divisors, whose sum is σ = 22121008948698. Its totient is φ = 22121008948696.

The previous prime is 22121008948693. The next prime is 22121008948711. The reversal of 22121008948697 is 79684980012122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20035480162201 + 2085528786496 = 4476101^2 + 1444136^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121008948697 - 2² = 22121008948693 is a prime.

It is not a weakly prime, because it can be changed into another prime (22121008948693) 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, 11060504474348 + 11060504474349.

It is an arithmetic number, because the mean of its divisors is an integer number (11060504474349).

Almost surely, 2^{22121008948697} is an apocalyptic number.

It is an amenable number.

22121008948697 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121008948697 is an equidigital number, since it uses as much as digits as its factorization.

22121008948697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6967296, while the sum is 59.

The spelling of 22121008948697 in words is "twenty-two trillion, one hundred twenty-one billion, eight million, nine hundred forty-eight thousand, six hundred ninety-seven".