120012565523 has 16 divisors (see below), whose sum is σ = 127619331840. Its totient is φ = 112535532000.

The previous prime is 120012565501. The next prime is 120012565549. The reversal of 120012565523 is 325565210021.

It is a cyclic number.

It is not a de Polignac number, because 120012565523 - 2²⁴ = 119995788307 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120012565523.

It is not an unprimeable number, because it can be changed into a prime (120012565223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7842986 + ... + 7858272.

It is an arithmetic number, because the mean of its divisors is an integer number (7976208240).

Almost surely, 2^120012565523 is an apocalyptic number.

120012565523 is a deficient number, since it is larger than the sum of its proper divisors (7606766317).

120012565523 is a wasteful number, since it uses less digits than its factorization.

120012565523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19498.

The product of its (nonzero) digits is 18000, while the sum is 32.

Adding to 120012565523 its reverse (325565210021), we get a palindrome (445577775544).

The spelling of 120012565523 in words is "one hundred twenty billion, twelve million, five hundred sixty-five thousand, five hundred twenty-three".