222212221000 has 256 divisors, whose sum is σ = 654724062720. Its totient is φ = 68572800000.

The previous prime is 222212220973. The next prime is 222212221001. The reversal of 222212221000 is 122212222.

It is not an unprimeable number, because it can be changed into a prime (222212221001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7762714 + ... + 7791286.

It is an arithmetic number, because the mean of its divisors is an integer number (2557515870).

Almost surely, 2^222212221000 is an apocalyptic number.

222212221000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222212221000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (327362031360).

222212221000 is an abundant number, since it is smaller than the sum of its proper divisors (432511841720).

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

222212221000 is a wasteful number, since it uses less digits than its factorization.

222212221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28713 (or 28699 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 222212221000 its reverse (122212222), we get a palindrome (222334433222).

It can be divided in two parts, 22221222 and 1000, that added together give a palindrome (22222222).

The spelling of 222212221000 in words is "two hundred twenty-two billion, two hundred twelve million, two hundred twenty-one thousand".