12239146081 has 2 divisors, whose sum is σ = 12239146082. Its totient is φ = 12239146080.

The previous prime is 12239146067. The next prime is 12239146097. The reversal of 12239146081 is 18064193221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8720758225 + 3518387856 = 93385^2 + 59316^2 .

It is a cyclic number.

It is not a de Polignac number, because 12239146081 - 2²⁵ = 12205591649 is a prime.

It is a super-2 number, since 2×12239146081² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12239146081.

It is not a weakly prime, because it can be changed into another prime (12239146781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6119573040 + 6119573041.

It is an arithmetic number, because the mean of its divisors is an integer number (6119573041).

Almost surely, 2^12239146081 is an apocalyptic number.

It is an amenable number.

12239146081 is a deficient number, since it is larger than the sum of its proper divisors (1).

12239146081 is an equidigital number, since it uses as much as digits as its factorization.

12239146081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 37.

The spelling of 12239146081 in words is "twelve billion, two hundred thirty-nine million, one hundred forty-six thousand, eighty-one".