12220121200121 has 4 divisors (see below), whose sum is σ = 12224168941200. Its totient is φ = 12216073459044.

The previous prime is 12220121200087. The next prime is 12220121200181. The reversal of 12220121200121 is 12100212102221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12220121200121 - 2⁶ = 12220121200057 is a prime.

It is a super-3 number, since 3×12220121200121³ (a number of 40 digits) contains 333 as substring.

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 12220121200121.

It is not an unprimeable number, because it can be changed into a prime (12220121200181) 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, 2023866011 + ... + 2023872048.

It is an arithmetic number, because the mean of its divisors is an integer number (3056042235300).

Almost surely, 2^{12220121200121} is an apocalyptic number.

It is an amenable number.

12220121200121 is a deficient number, since it is larger than the sum of its proper divisors (4047741079).

12220121200121 is an equidigital number, since it uses as much as digits as its factorization.

12220121200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4047741078.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12220121200121 its reverse (12100212102221), we get a palindrome (24320333302342).

The spelling of 12220121200121 in words is "twelve trillion, two hundred twenty billion, one hundred twenty-one million, two hundred thousand, one hundred twenty-one".