22121004204 has 96 divisors (see below), whose sum is σ = 62128472000. Its totient is φ = 6806389824.

The previous prime is 22121004203. The next prime is 22121004253. The reversal of 22121004204 is 40240012122.

22121004204 is a `hidden beast` number, since 221 + 21 + 0 + 0 + 420 + 4 = 666.

It is a super-3 number, since 3×22121004204³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121004203) 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, 190662 + ... + 283890.

Almost surely, 2^22121004204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22121004204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31064236000).

22121004204 is an abundant number, since it is smaller than the sum of its proper divisors (40007467796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22121004204 is a wasteful number, since it uses less digits than its factorization.

22121004204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93281 (or 93247 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 22121004204 its reverse (40240012122), we get a palindrome (62361016326).

The spelling of 22121004204 in words is "twenty-two billion, one hundred twenty-one million, four thousand, two hundred four".