12200012123 has 4 divisors (see below), whose sum is σ = 13138474608. Its totient is φ = 11261549640.

The previous prime is 12200012063. The next prime is 12200012129. The reversal of 12200012123 is 32121000221.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12200012123 - 2¹⁰ = 12200011099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12200012098 and 12200012107.

It is not an unprimeable number, because it can be changed into a prime (12200012129) 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, 469231223 + ... + 469231248.

It is an arithmetic number, because the mean of its divisors is an integer number (3284618652).

Almost surely, 2^12200012123 is an apocalyptic number.

12200012123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12200012123 is a deficient number, since it is larger than the sum of its proper divisors (938462485).

12200012123 is an equidigital number, since it uses as much as digits as its factorization.

12200012123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938462484.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 12200012123 its reverse (32121000221), we get a palindrome (44321012344).

The spelling of 12200012123 in words is "twelve billion, two hundred million, twelve thousand, one hundred twenty-three".