12221121212202 has 128 divisors (see below), whose sum is σ = 28763839272960. Its totient is φ = 3389099616000.

The previous prime is 12221121212191. The next prime is 12221121212231. The reversal of 12221121212202 is 20221212112221.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 216270952 + ... + 216327452.

It is an arithmetic number, because the mean of its divisors is an integer number (224717494320).

Almost surely, 2^{12221121212202} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12221121212202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14381919636480).

12221121212202 is an abundant number, since it is smaller than the sum of its proper divisors (16542718060758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12221121212202 is a wasteful number, since it uses less digits than its factorization.

12221121212202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57308.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 12221121212202 its reverse (20221212112221), we get a palindrome (32442333324423).

The spelling of 12221121212202 in words is "twelve trillion, two hundred twenty-one billion, one hundred twenty-one million, two hundred twelve thousand, two hundred two".