22012111121 has 32 divisors (see below), whose sum is σ = 29571015936. Its totient is φ = 15824160000.

The previous prime is 22012111091. The next prime is 22012111129. The reversal of 22012111121 is 12111121022.

It is not a de Polignac number, because 22012111121 - 2¹⁰ = 22012110097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22012111096 and 22012111105.

It is not an unprimeable number, because it can be changed into a prime (22012111129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2218271 + ... + 2228171.

It is an arithmetic number, because the mean of its divisors is an integer number (924094248).

Almost surely, 2^22012111121 is an apocalyptic number.

It is an amenable number.

22012111121 is a deficient number, since it is larger than the sum of its proper divisors (7558904815).

22012111121 is a wasteful number, since it uses less digits than its factorization.

22012111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12153.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 22012111121 its reverse (12111121022), we get a palindrome (34123232143).

Subtracting from 22012111121 its reverse (12111121022), we obtain a palindrome (9900990099).

The spelling of 22012111121 in words is "twenty-two billion, twelve million, one hundred eleven thousand, one hundred twenty-one".