15120455123 has 4 divisors (see below), whose sum is σ = 15147601920. Its totient is φ = 15093308328.

The previous prime is 15120455101. The next prime is 15120455173. The reversal of 15120455123 is 32155402151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32155402151 = 37 ⋅869064923.

It is a cyclic number.

It is not a de Polignac number, because 15120455123 - 2⁶ = 15120455059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15120455173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13572563 + ... + 13573676.

It is an arithmetic number, because the mean of its divisors is an integer number (3786900480).

Almost surely, 2^15120455123 is an apocalyptic number.

15120455123 is a deficient number, since it is larger than the sum of its proper divisors (27146797).

15120455123 is an equidigital number, since it uses as much as digits as its factorization.

15120455123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27146796.

The product of its (nonzero) digits is 6000, while the sum is 29.

Adding to 15120455123 its reverse (32155402151), we get a palindrome (47275857274).

The spelling of 15120455123 in words is "fifteen billion, one hundred twenty million, four hundred fifty-five thousand, one hundred twenty-three".