222221421200 has 60 divisors (see below), whose sum is σ = 534126306288. Its totient is φ = 88848720000.

The previous prime is 222221421139. The next prime is 222221421221. The reversal of 222221421200 is 2124122222.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 776999 + ... + 1023801.

Almost surely, 2^222221421200 is an apocalyptic number.

222221421200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222221421200 is an abundant number, since it is smaller than the sum of its proper divisors (311904885088).

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

222221421200 is a wasteful number, since it uses less digits than its factorization.

222221421200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249072 (or 249061 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 222221421200 its reverse (2124122222), we get a palindrome (224345543422).

The spelling of 222221421200 in words is "two hundred twenty-two billion, two hundred twenty-one million, four hundred twenty-one thousand, two hundred".