12232978081 has 2 divisors, whose sum is σ = 12232978082. Its totient is φ = 12232978080.

The previous prime is 12232978027. The next prime is 12232978091. The reversal of 12232978081 is 18087923221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9666035856 + 2566942225 = 98316^2 + 50665^2 .

It is a cyclic number.

It is not a de Polignac number, because 12232978081 - 2¹¹ = 12232976033 is a prime.

It is a super-2 number, since 2×12232978081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12232978001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6116489040 + 6116489041.

It is an arithmetic number, because the mean of its divisors is an integer number (6116489041).

Almost surely, 2^12232978081 is an apocalyptic number.

It is an amenable number.

12232978081 is a deficient number, since it is larger than the sum of its proper divisors (1).

12232978081 is an equidigital number, since it uses as much as digits as its factorization.

12232978081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 43.

The spelling of 12232978081 in words is "twelve billion, two hundred thirty-two million, nine hundred seventy-eight thousand, eighty-one".