12402852221 has 2 divisors, whose sum is σ = 12402852222. Its totient is φ = 12402852220.

The previous prime is 12402852179. The next prime is 12402852227. The reversal of 12402852221 is 12225820421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6808560196 + 5594292025 = 82514^2 + 74795^2 .

It is a cyclic number.

It is not a de Polignac number, because 12402852221 - 2⁶ = 12402852157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12402852227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6201426110 + 6201426111.

It is an arithmetic number, because the mean of its divisors is an integer number (6201426111).

Almost surely, 2^12402852221 is an apocalyptic number.

It is an amenable number.

12402852221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12402852221 is an equidigital number, since it uses as much as digits as its factorization.

12402852221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5120, while the sum is 29.

The spelling of 12402852221 in words is "twelve billion, four hundred two million, eight hundred fifty-two thousand, two hundred twenty-one".