12220121200123 has 4 divisors (see below), whose sum is σ = 12221534429680. Its totient is φ = 12218707970568.

The previous prime is 12220121200087. The next prime is 12220121200181. The reversal of 12220121200123 is 32100212102221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12220121200123 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 12220121200123.

It is not an unprimeable number, because it can be changed into a prime (12220121200193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 706601808 + ... + 706619101.

It is an arithmetic number, because the mean of its divisors is an integer number (3055383607420).

Almost surely, 2^{12220121200123} is an apocalyptic number.

12220121200123 is a deficient number, since it is larger than the sum of its proper divisors (1413229557).

12220121200123 is an equidigital number, since it uses as much as digits as its factorization.

12220121200123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1413229556.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 12220121200123 its reverse (32100212102221), we get a palindrome (44320333302344).

The spelling of 12220121200123 in words is "twelve trillion, two hundred twenty billion, one hundred twenty-one million, two hundred thousand, one hundred twenty-three".