22012221121 has 16 divisors (see below), whose sum is σ = 24352939008. Its totient is φ = 19729964800.

The previous prime is 22012221067. The next prime is 22012221137. The reversal of 22012221121 is 12112221022.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 22012221121 - 2⁹ = 22012220609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22012221095 and 22012221104.

It is not an unprimeable number, because it can be changed into a prime (22012221521) 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, 191055 + ... + 283771.

It is an arithmetic number, because the mean of its divisors is an integer number (1522058688).

Almost surely, 2^22012221121 is an apocalyptic number.

It is an amenable number.

22012221121 is a deficient number, since it is larger than the sum of its proper divisors (2340717887).

22012221121 is a wasteful number, since it uses less digits than its factorization.

22012221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93032.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22012221121 its reverse (12112221022), we get a palindrome (34124442143).

Subtracting from 22012221121 its reverse (12112221022), we obtain a palindrome (9900000099).

The spelling of 22012221121 in words is "twenty-two billion, twelve million, two hundred twenty-one thousand, one hundred twenty-one".