123240012089 has 2 divisors, whose sum is σ = 123240012090. Its totient is φ = 123240012088.

The previous prime is 123240012079. The next prime is 123240012127. The reversal of 123240012089 is 980210042321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114154109689 + 9085902400 = 337867^2 + 95320^2 .

It is a cyclic number.

It is not a de Polignac number, because 123240012089 - 2²⁰ = 123238963513 is a prime.

It is a super-2 number, since 2×123240012089² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123240012019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61620006044 + 61620006045.

It is an arithmetic number, because the mean of its divisors is an integer number (61620006045).

Almost surely, 2^123240012089 is an apocalyptic number.

It is an amenable number.

123240012089 is a deficient number, since it is larger than the sum of its proper divisors (1).

123240012089 is an equidigital number, since it uses as much as digits as its factorization.

123240012089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

The spelling of 123240012089 in words is "one hundred twenty-three billion, two hundred forty million, twelve thousand, eighty-nine".