22012121121 has 8 divisors (see below), whose sum is σ = 29412343584. Its totient is φ = 14643323040.

The previous prime is 22012121081. The next prime is 22012121147. The reversal of 22012121121 is 12112121022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22012121121 - 2⁹ = 22012120609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22012121121.

It is not an unprimeable number, because it can be changed into a prime (22012121171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7854460 + ... + 7857261.

It is an arithmetic number, because the mean of its divisors is an integer number (3676542948).

Almost surely, 2^22012121121 is an apocalyptic number.

It is an amenable number.

22012121121 is a deficient number, since it is larger than the sum of its proper divisors (7400222463).

22012121121 is a wasteful number, since it uses less digits than its factorization.

22012121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15712191.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22012121121 its reverse (12112121022), we get a palindrome (34124242143).

Subtracting from 22012121121 its reverse (12112121022), we obtain a palindrome (9900000099).

The spelling of 22012121121 in words is "twenty-two billion, twelve million, one hundred twenty-one thousand, one hundred twenty-one".