22220121228 has 12 divisors (see below), whose sum is σ = 51846949560. Its totient is φ = 7406707072.

The previous prime is 22220121227. The next prime is 22220121277. The reversal of 22220121228 is 82212102222.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 22220121198 and 22220121207.

It is not an unprimeable number, because it can be changed into a prime (22220121227) 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, 925838373 + ... + 925838396.

It is an arithmetic number, because the mean of its divisors is an integer number (4320579130).

Almost surely, 2^22220121228 is an apocalyptic number.

It is an amenable number.

22220121228 is an abundant number, since it is smaller than the sum of its proper divisors (29626828332).

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

22220121228 is a wasteful number, since it uses less digits than its factorization.

22220121228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851676776 (or 1851676774 counting only the distinct ones).

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

The spelling of 22220121228 in words is "twenty-two billion, two hundred twenty million, one hundred twenty-one thousand, two hundred twenty-eight".