22011221121 has 32 divisors (see below), whose sum is σ = 32516656128. Its totient is φ = 13182289920.

The previous prime is 22011221101. The next prime is 22011221143. The reversal of 22011221121 is 12112211022.

It is not a de Polignac number, because 22011221121 - 2¹⁰ = 22011220097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22011221121.

It is not an unprimeable number, because it can be changed into a prime (22011221101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20055 + ... + 210771.

It is an arithmetic number, because the mean of its divisors is an integer number (1016145504).

Almost surely, 2^22011221121 is an apocalyptic number.

It is an amenable number.

22011221121 is a deficient number, since it is larger than the sum of its proper divisors (10505435007).

22011221121 is a wasteful number, since it uses less digits than its factorization.

22011221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190841.

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

Adding to 22011221121 its reverse (12112211022), we get a palindrome (34123432143).

The spelling of 22011221121 in words is "twenty-two billion, eleven million, two hundred twenty-one thousand, one hundred twenty-one".