12222112120121 has 4 divisors (see below), whose sum is σ = 12244456018512. Its totient is φ = 12199768221732.

The previous prime is 12222112120063. The next prime is 12222112120123. The reversal of 12222112120121 is 12102121122221.

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 12222112120121 - 2¹⁰ = 12222112119097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12222112120093 and 12222112120102.

It is not an unprimeable number, because it can be changed into a prime (12222112120123) 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, 11171948375 + ... + 11171949468.

It is an arithmetic number, because the mean of its divisors is an integer number (3061114004628).

Almost surely, 2^{12222112120121} is an apocalyptic number.

It is an amenable number.

12222112120121 is a deficient number, since it is larger than the sum of its proper divisors (22343898391).

12222112120121 is an equidigital number, since it uses as much as digits as its factorization.

12222112120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22343898390.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 12222112120121 its reverse (12102121122221), we get a palindrome (24324233242342).

The spelling of 12222112120121 in words is "twelve trillion, two hundred twenty-two billion, one hundred twelve million, one hundred twenty thousand, one hundred twenty-one".