22010121221 has 24 divisors (see below), whose sum is σ = 25526671776. Its totient is φ = 18817329920.

The previous prime is 22010121167. The next prime is 22010121223. The reversal of 22010121221 is 12212101022.

It is not a de Polignac number, because 22010121221 - 2³⁰ = 20936379397 is a prime.

It is a super-2 number, since 2×22010121221² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22010121196 and 22010121205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22010121223) 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 23 ways as a sum of consecutive naturals, for example, 6346730 + ... + 6350196.

It is an arithmetic number, because the mean of its divisors is an integer number (1063611324).

Almost surely, 2^22010121221 is an apocalyptic number.

It is an amenable number.

22010121221 is a deficient number, since it is larger than the sum of its proper divisors (3516550555).

22010121221 is a wasteful number, since it uses less digits than its factorization.

22010121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5509 (or 5492 counting only the distinct ones).

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

Adding to 22010121221 its reverse (12212101022), we get a palindrome (34222222243).

The spelling of 22010121221 in words is "twenty-two billion, ten million, one hundred twenty-one thousand, two hundred twenty-one".