2222142121 has 4 divisors (see below), whose sum is σ = 2247110100. Its totient is φ = 2197174144.

The previous prime is 2222142101. The next prime is 2222142163. The reversal of 2222142121 is 1212412222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 180096400 + 2042045721 = 13420^2 + 45189^2 .

It is a cyclic number.

It is not a de Polignac number, because 2222142121 - 2⁷ = 2222141993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2222142101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12483856 + ... + 12484033.

It is an arithmetic number, because the mean of its divisors is an integer number (561777525).

Almost surely, 2^2222142121 is an apocalyptic number.

It is an amenable number.

2222142121 is a deficient number, since it is larger than the sum of its proper divisors (24967979).

2222142121 is an equidigital number, since it uses as much as digits as its factorization.

2222142121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24967978.

The product of its digits is 256, while the sum is 19.

The square root of 2222142121 is about 47139.6024696857. The cubic root of 2222142121 is about 1304.9402009171.

Adding to 2222142121 its reverse (1212412222), we get a palindrome (3434554343).

The spelling of 2222142121 in words is "two billion, two hundred twenty-two million, one hundred forty-two thousand, one hundred twenty-one".