12257733731 has 2 divisors, whose sum is σ = 12257733732. Its totient is φ = 12257733730.

The previous prime is 12257733673. The next prime is 12257733743. The reversal of 12257733731 is 13733775221.

It is a strong prime.

It is an emirp because it is prime and its reverse (13733775221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12257733731 - 2¹⁸ = 12257471587 is a prime.

It is a super-2 number, since 2×12257733731² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12257733751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6128866865 + 6128866866.

It is an arithmetic number, because the mean of its divisors is an integer number (6128866866).

Almost surely, 2^12257733731 is an apocalyptic number.

12257733731 is a deficient number, since it is larger than the sum of its proper divisors (1).

12257733731 is an equidigital number, since it uses as much as digits as its factorization.

12257733731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 185220, while the sum is 41.

The spelling of 12257733731 in words is "twelve billion, two hundred fifty-seven million, seven hundred thirty-three thousand, seven hundred thirty-one".