12051531979 has 2 divisors, whose sum is σ = 12051531980. Its totient is φ = 12051531978.

The previous prime is 12051531971. The next prime is 12051532049. The reversal of 12051531979 is 97913515021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12051531979 - 2³ = 12051531971 is a prime.

It is not a weakly prime, because it can be changed into another prime (12051531971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6025765989 + 6025765990.

It is an arithmetic number, because the mean of its divisors is an integer number (6025765990).

Almost surely, 2^12051531979 is an apocalyptic number.

12051531979 is a deficient number, since it is larger than the sum of its proper divisors (1).

12051531979 is an equidigital number, since it uses as much as digits as its factorization.

12051531979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 85050, while the sum is 43.

The spelling of 12051531979 in words is "twelve billion, fifty-one million, five hundred thirty-one thousand, nine hundred seventy-nine".