2222111121 has 16 divisors (see below), whose sum is σ = 3102212736. Its totient is φ = 1412149376.

The previous prime is 2222111119. The next prime is 2222111141. The reversal of 2222111121 is 1211112222.

It is a cyclic number.

It is not a de Polignac number, because 2222111121 - 2¹ = 2222111119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2222111121.

It is not an unprimeable number, because it can be changed into a prime (2222111141) 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, 34740 + ... + 75173.

It is an arithmetic number, because the mean of its divisors is an integer number (193888296).

Almost surely, 2^2222111121 is an apocalyptic number.

It is an amenable number.

2222111121 is a deficient number, since it is larger than the sum of its proper divisors (880101615).

2222111121 is a wasteful number, since it uses less digits than its factorization.

2222111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110232.

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

The square root of 2222111121 is about 47139.2736579596. The cubic root of 2222111121 is about 1304.9341326982.

Adding to 2222111121 its reverse (1211112222), we get a palindrome (3433223343).

The spelling of 2222111121 in words is "two billion, two hundred twenty-two million, one hundred eleven thousand, one hundred twenty-one".