123012013009 has 2 divisors, whose sum is σ = 123012013010. Its totient is φ = 123012013008.

The previous prime is 123012012923. The next prime is 123012013013. The reversal of 123012013009 is 900310210321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118928419600 + 4083593409 = 344860^2 + 63903^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123012013009 is a prime.

It is not a weakly prime, because it can be changed into another prime (123012013309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61506006504 + 61506006505.

It is an arithmetic number, because the mean of its divisors is an integer number (61506006505).

Almost surely, 2^123012013009 is an apocalyptic number.

It is an amenable number.

123012013009 is a deficient number, since it is larger than the sum of its proper divisors (1).

123012013009 is an equidigital number, since it uses as much as digits as its factorization.

123012013009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 22.

The spelling of 123012013009 in words is "one hundred twenty-three billion, twelve million, thirteen thousand, nine".