22121022228 has 24 divisors (see below), whose sum is σ = 51631456800. Its totient is φ = 7371425760.

The previous prime is 22121022221. The next prime is 22121022239. The reversal of 22121022228 is 82222012122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22121022198 and 22121022207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121022221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239803 + ... + 318978.

It is an arithmetic number, because the mean of its divisors is an integer number (2151310700).

Almost surely, 2^22121022228 is an apocalyptic number.

It is an amenable number.

22121022228 is an abundant number, since it is smaller than the sum of its proper divisors (29510434572).

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

22121022228 is a wasteful number, since it uses less digits than its factorization.

22121022228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562087 (or 562085 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

The spelling of 22121022228 in words is "twenty-two billion, one hundred twenty-one million, twenty-two thousand, two hundred twenty-eight".