12022556657 has 2 divisors, whose sum is σ = 12022556658. Its totient is φ = 12022556656.

The previous prime is 12022556627. The next prime is 12022556677. The reversal of 12022556657 is 75665522021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8744307121 + 3278249536 = 93511^2 + 57256^2 .

It is a cyclic number.

It is not a de Polignac number, because 12022556657 - 2⁸ = 12022556401 is a prime.

It is not a weakly prime, because it can be changed into another prime (12022556627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6011278328 + 6011278329.

It is an arithmetic number, because the mean of its divisors is an integer number (6011278329).

Almost surely, 2^12022556657 is an apocalyptic number.

It is an amenable number.

12022556657 is a deficient number, since it is larger than the sum of its proper divisors (1).

12022556657 is an equidigital number, since it uses as much as digits as its factorization.

12022556657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252000, while the sum is 41.

The spelling of 12022556657 in words is "twelve billion, twenty-two million, five hundred fifty-six thousand, six hundred fifty-seven".