22112121212121 has 16 divisors (see below), whose sum is σ = 30513723226560. Its totient is φ = 14226441526080.

The previous prime is 22112121212099. The next prime is 22112121212239. The reversal of 22112121212121 is 12121212121122.

It is not a de Polignac number, because 22112121212121 - 2¹⁴ = 22112121195737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22112121210121) 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, 59169715 + ... + 59542248.

It is an arithmetic number, because the mean of its divisors is an integer number (1907107701660).

Almost surely, 2^{22112121212121} is an apocalyptic number.

It is an amenable number.

22112121212121 is a deficient number, since it is larger than the sum of its proper divisors (8401602014439).

22112121212121 is a wasteful number, since it uses less digits than its factorization.

22112121212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118714136.

The product of its digits is 128, while the sum is 21.

Adding to 22112121212121 its reverse (12121212121122), we get a palindrome (34233333333243).

Subtracting from 22112121212121 its reverse (12121212121122), we obtain a palindrome (9990909090999).

The spelling of 22112121212121 in words is "twenty-two trillion, one hundred twelve billion, one hundred twenty-one million, two hundred twelve thousand, one hundred twenty-one".