22011220121 has 8 divisors (see below), whose sum is σ = 24031888704. Its totient is φ = 19993826320.

The previous prime is 22011220103. The next prime is 22011220141. The reversal of 22011220121 is 12102211022.

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

It is a cyclic number.

It is not a de Polignac number, because 22011220121 - 2²⁶ = 21944111257 is a prime.

It is a super-2 number, since 2×22011220121² (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 = 22011220096 and 22011220105.

It is not an unprimeable number, because it can be changed into a prime (22011220141) 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, 804626 + ... + 831531.

It is an arithmetic number, because the mean of its divisors is an integer number (3003986088).

Almost surely, 2^22011220121 is an apocalyptic number.

It is an amenable number.

22011220121 is a deficient number, since it is larger than the sum of its proper divisors (2020668583).

22011220121 is a wasteful number, since it uses less digits than its factorization.

22011220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637391.

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

Adding to 22011220121 its reverse (12102211022), we get a palindrome (34113431143).

Subtracting from 22011220121 its reverse (12102211022), we obtain a palindrome (9909009099).

The spelling of 22011220121 in words is "twenty-two billion, eleven million, two hundred twenty thousand, one hundred twenty-one".