12128823731 has 2 divisors, whose sum is σ = 12128823732. Its totient is φ = 12128823730.

The previous prime is 12128823677. The next prime is 12128823799. The reversal of 12128823731 is 13732882121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12128823731 - 2³⁰ = 11055081907 is a prime.

It is a super-2 number, since 2×12128823731² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12128823131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6064411865 + 6064411866.

It is an arithmetic number, because the mean of its divisors is an integer number (6064411866).

Almost surely, 2^12128823731 is an apocalyptic number.

12128823731 is a deficient number, since it is larger than the sum of its proper divisors (1).

12128823731 is an equidigital number, since it uses as much as digits as its factorization.

12128823731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 38.

The spelling of 12128823731 in words is "twelve billion, one hundred twenty-eight million, eight hundred twenty-three thousand, seven hundred thirty-one".