12012312539 has 2 divisors, whose sum is σ = 12012312540. Its totient is φ = 12012312538.

The previous prime is 12012312527. The next prime is 12012312581. The reversal of 12012312539 is 93521321021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12012312539 - 2⁸ = 12012312283 is a prime.

It is not a weakly prime, because it can be changed into another prime (12012312509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006156269 + 6006156270.

It is an arithmetic number, because the mean of its divisors is an integer number (6006156270).

Almost surely, 2^12012312539 is an apocalyptic number.

12012312539 is a deficient number, since it is larger than the sum of its proper divisors (1).

12012312539 is an equidigital number, since it uses as much as digits as its factorization.

12012312539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 29.

The spelling of 12012312539 in words is "twelve billion, twelve million, three hundred twelve thousand, five hundred thirty-nine".