12222222220121 has 8 divisors (see below), whose sum is σ = 12249574077024. Its totient is φ = 12194873016480.

The previous prime is 12222222220111. The next prime is 12222222220127. The reversal of 12222222220121 is 12102222222221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12222222220121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12222222220127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8707886 + ... + 10013576.

It is an arithmetic number, because the mean of its divisors is an integer number (1531196759628).

Almost surely, 2^{12222222220121} is an apocalyptic number.

It is an amenable number.

12222222220121 is a deficient number, since it is larger than the sum of its proper divisors (27351856903).

12222222220121 is a wasteful number, since it uses less digits than its factorization.

12222222220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326631.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 12222222220121 its reverse (12102222222221), we get a palindrome (24324444442342).

The spelling of 12222222220121 in words is "twelve trillion, two hundred twenty-two billion, two hundred twenty-two million, two hundred twenty thousand, one hundred twenty-one".