12220220121 has 8 divisors (see below), whose sum is σ = 16330408800. Its totient is φ = 8128422432.

The previous prime is 12220220093. The next prime is 12220220161. The reversal of 12220220121 is 12102202221.

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

It is not a de Polignac number, because 12220220121 - 2¹⁰ = 12220219097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12220220121.

It is not an unprimeable number, because it can be changed into a prime (12220220161) 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, 4596196 + ... + 4598853.

It is an arithmetic number, because the mean of its divisors is an integer number (2041301100).

Almost surely, 2^12220220121 is an apocalyptic number.

It is an amenable number.

12220220121 is a deficient number, since it is larger than the sum of its proper divisors (4110188679).

12220220121 is an equidigital number, since it uses as much as digits as its factorization.

12220220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9195495.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 12220220121 its reverse (12102202221), we get a palindrome (24322422342).

The spelling of 12220220121 in words is "twelve billion, two hundred twenty million, two hundred twenty thousand, one hundred twenty-one".