12220211121 has 16 divisors (see below), whose sum is σ = 17005317120. Its totient is φ = 7791093200.

The previous prime is 12220211071. The next prime is 12220211123. The reversal of 12220211121 is 12111202221.

It is a cyclic number.

It is not a de Polignac number, because 12220211121 - 2¹¹ = 12220209073 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12220211121.

It is not an unprimeable number, because it can be changed into a prime (12220211123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 424846 + ... + 452696.

It is an arithmetic number, because the mean of its divisors is an integer number (1062832320).

Almost surely, 2^12220211121 is an apocalyptic number.

It is an amenable number.

12220211121 is a deficient number, since it is larger than the sum of its proper divisors (4785105999).

12220211121 is a wasteful number, since it uses less digits than its factorization.

12220211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34236.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12220211121 its reverse (12111202221), we get a palindrome (24331413342).

The spelling of 12220211121 in words is "twelve billion, two hundred twenty million, two hundred eleven thousand, one hundred twenty-one".