2222222221121 has 4 divisors (see below), whose sum is σ = 2539682538432. Its totient is φ = 1904761903812.

The previous prime is 2222222221103. The next prime is 2222222221151. The reversal of 2222222221121 is 1211222222222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2222222221121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2222222221151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158730158645 + ... + 158730158658.

It is an arithmetic number, because the mean of its divisors is an integer number (634920634608).

Almost surely, 2^{2222222221121} is an apocalyptic number.

It is an amenable number.

2222222221121 is a deficient number, since it is larger than the sum of its proper divisors (317460317311).

2222222221121 is an equidigital number, since it uses as much as digits as its factorization.

2222222221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317460317310.

The product of its digits is 1024, while the sum is 23.

Adding to 2222222221121 its reverse (1211222222222), we get a palindrome (3433444443343).

The spelling of 2222222221121 in words is "two trillion, two hundred twenty-two billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred twenty-one".