12789820123 has 4 divisors (see below), whose sum is σ = 12790357360. Its totient is φ = 12789282888.

The previous prime is 12789820117. The next prime is 12789820139. The reversal of 12789820123 is 32102898721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32102898721 = 1279 ⋅25099999.

It is a cyclic number.

It is not a de Polignac number, because 12789820123 - 2²⁹ = 12252949211 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 12789820123.

It is not an unprimeable number, because it can be changed into a prime (12789820423) 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, 231168 + ... + 281101.

It is an arithmetic number, because the mean of its divisors is an integer number (3197589340).

Almost surely, 2^12789820123 is an apocalyptic number.

12789820123 is a deficient number, since it is larger than the sum of its proper divisors (537237).

12789820123 is an equidigital number, since it uses as much as digits as its factorization.

12789820123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537236.

The product of its (nonzero) digits is 96768, while the sum is 43.

The spelling of 12789820123 in words is "twelve billion, seven hundred eighty-nine million, eight hundred twenty thousand, one hundred twenty-three".