22211222022121 has 4 divisors (see below), whose sum is σ = 24230424024144. Its totient is φ = 20192020020100.

The previous prime is 22211222022097. The next prime is 22211222022137. The reversal of 22211222022121 is 12122022211222.

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 not a de Polignac number, because 22211222022121 - 2⁵ = 22211222022089 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22211222022092 and 22211222022101.

It is not an unprimeable number, because it can be changed into a prime (22211222026121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1009601000995 + ... + 1009601001016.

It is an arithmetic number, because the mean of its divisors is an integer number (6057606006036).

Almost surely, 2^{22211222022121} is an apocalyptic number.

It is an amenable number.

22211222022121 is a deficient number, since it is larger than the sum of its proper divisors (2019202002023).

22211222022121 is a wasteful number, since it uses less digits than its factorization.

22211222022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2019202002022.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 22211222022121 its reverse (12122022211222), we get a palindrome (34333244233343).

The spelling of 22211222022121 in words is "twenty-two trillion, two hundred eleven billion, two hundred twenty-two million, twenty-two thousand, one hundred twenty-one".