12121102219957 has 2 divisors, whose sum is σ = 12121102219958. Its totient is φ = 12121102219956.

The previous prime is 12121102219903. The next prime is 12121102220039. The reversal of 12121102219957 is 75991220112121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9952548514756 + 2168553705201 = 3154766^2 + 1472601^2 .

It is a cyclic number.

It is not a de Polignac number, because 12121102219957 - 2³⁵ = 12086742481589 is a prime.

It is a super-2 number, since 2×12121102219957² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12121102259957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060551109978 + 6060551109979.

It is an arithmetic number, because the mean of its divisors is an integer number (6060551109979).

Almost surely, 2^{12121102219957} is an apocalyptic number.

It is an amenable number.

12121102219957 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121102219957 is an equidigital number, since it uses as much as digits as its factorization.

12121102219957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 43.

The spelling of 12121102219957 in words is "twelve trillion, one hundred twenty-one billion, one hundred two million, two hundred nineteen thousand, nine hundred fifty-seven".