12257367181 has 2 divisors, whose sum is σ = 12257367182. Its totient is φ = 12257367180.

The previous prime is 12257367179. The next prime is 12257367197. The reversal of 12257367181 is 18176375221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7240478281 + 5016888900 = 85091^2 + 70830^2 .

It is a cyclic number.

It is not a de Polignac number, because 12257367181 - 2¹ = 12257367179 is a prime.

It is a super-2 number, since 2×12257367181² (a number of 21 digits) contains 22 as substring.

Together with 12257367179, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12257367151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6128683590 + 6128683591.

It is an arithmetic number, because the mean of its divisors is an integer number (6128683591).

Almost surely, 2^12257367181 is an apocalyptic number.

It is an amenable number.

12257367181 is a deficient number, since it is larger than the sum of its proper divisors (1).

12257367181 is an equidigital number, since it uses as much as digits as its factorization.

12257367181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 43.

The spelling of 12257367181 in words is "twelve billion, two hundred fifty-seven million, three hundred sixty-seven thousand, one hundred eighty-one".