222222002100 has 216 divisors, whose sum is σ = 759102351840. Its totient is φ = 50035265280.

The previous prime is 222222002083. The next prime is 222222002159. The reversal of 222222002100 is 1200222222.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 222222002100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 872086 + ... + 1097714.

It is an arithmetic number, because the mean of its divisors is an integer number (3514362740).

Almost surely, 2^222222002100 is an apocalyptic number.

222222002100 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 222222002100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (379551175920).

222222002100 is an abundant number, since it is smaller than the sum of its proper divisors (536880349740).

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

222222002100 is a wasteful number, since it uses less digits than its factorization.

222222002100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225727 (or 225713 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 222222002100 its reverse (1200222222), we get a palindrome (223422224322).

The spelling of 222222002100 in words is "two hundred twenty-two billion, two hundred twenty-two million, two thousand, one hundred".