22011021121 has 4 divisors (see below), whose sum is σ = 22047768000. Its totient is φ = 21974274244.

The previous prime is 22011021119. The next prime is 22011021163. The reversal of 22011021121 is 12112011022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12112011022 = 2 ⋅6056005511.

It is a cyclic number.

It is not a de Polignac number, because 22011021121 - 2¹ = 22011021119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22011021521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18372541 + ... + 18373738.

It is an arithmetic number, because the mean of its divisors is an integer number (5511942000).

Almost surely, 2^22011021121 is an apocalyptic number.

It is an amenable number.

22011021121 is a deficient number, since it is larger than the sum of its proper divisors (36746879).

22011021121 is an equidigital number, since it uses as much as digits as its factorization.

22011021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36746878.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 22011021121 its reverse (12112011022), we get a palindrome (34123032143).

The spelling of 22011021121 in words is "twenty-two billion, eleven million, twenty-one thousand, one hundred twenty-one".