12045210123 has 4 divisors (see below), whose sum is σ = 16060280168. Its totient is φ = 8030140080.

The previous prime is 12045210097. The next prime is 12045210127. The reversal of 12045210123 is 32101254021.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12045210123 - 2¹⁴ = 12045193739 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 12045210123.

It is not an unprimeable number, because it can be changed into a prime (12045210127) 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, 2007535018 + ... + 2007535023.

It is an arithmetic number, because the mean of its divisors is an integer number (4015070042).

Almost surely, 2^12045210123 is an apocalyptic number.

12045210123 is a deficient number, since it is larger than the sum of its proper divisors (4015070045).

12045210123 is an equidigital number, since it uses as much as digits as its factorization.

12045210123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4015070044.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 12045210123 its reverse (32101254021), we get a palindrome (44146464144).

The spelling of 12045210123 in words is "twelve billion, forty-five million, two hundred ten thousand, one hundred twenty-three".