22011022121 has 4 divisors (see below), whose sum is σ = 24012024144. Its totient is φ = 20010020100.

The previous prime is 22011022091. The next prime is 22011022133. The reversal of 22011022121 is 12122011022.

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.

It is a cyclic number.

It is not a de Polignac number, because 22011022121 - 2³⁰ = 20937280297 is a prime.

It is a super-2 number, since 2×22011022121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22011022096 and 22011022105.

It is not an unprimeable number, because it can be changed into a prime (22011022151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1000500995 + ... + 1000501016.

It is an arithmetic number, because the mean of its divisors is an integer number (6003006036).

Almost surely, 2^22011022121 is an apocalyptic number.

It is an amenable number.

22011022121 is a deficient number, since it is larger than the sum of its proper divisors (2001002023).

22011022121 is a wasteful number, since it uses less digits than its factorization.

22011022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2001002022.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22011022121 its reverse (12122011022), we get a palindrome (34133033143).

It can be divided in two parts, 22011022 and 121, that multiplied together give a palindrome (2663333662).

The spelling of 22011022121 in words is "twenty-two billion, eleven million, twenty-two thousand, one hundred twenty-one".