2212220121 has 16 divisors (see below), whose sum is σ = 3060591744. Its totient is φ = 1420153344.

The previous prime is 2212220119. The next prime is 2212220147. The reversal of 2212220121 is 1210222122.

It is not a de Polignac number, because 2212220121 - 2¹ = 2212220119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2212220121.

It is not an unprimeable number, because it can be changed into a prime (2212220821) 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, 91965 + ... + 113498.

It is an arithmetic number, because the mean of its divisors is an integer number (191286984).

Almost surely, 2^2212220121 is an apocalyptic number.

It is an amenable number.

2212220121 is a deficient number, since it is larger than the sum of its proper divisors (848371623).

2212220121 is a wasteful number, since it uses less digits than its factorization.

2212220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205600.

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

The square root of 2212220121 is about 47034.2441312710. The cubic root of 2212220121 is about 1302.9950905168.

Adding to 2212220121 its reverse (1210222122), we get a palindrome (3422442243).

The spelling of 2212220121 in words is "two billion, two hundred twelve million, two hundred twenty thousand, one hundred twenty-one".