1222222800 has 120 divisors (see below), whose sum is σ = 3922971136. Its totient is φ = 325278720.

The previous prime is 1222222789. The next prime is 1222222831. The reversal of 1222222800 is 82222221.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1123857 + ... + 1124943.

Almost surely, 2^1222222800 is an apocalyptic number.

1222222800 is a gapful number since it is divisible by the number (10) 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 1222222800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1961485568).

1222222800 is an abundant number, since it is smaller than the sum of its proper divisors (2700748336).

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

1222222800 is a wasteful number, since it uses less digits than its factorization.

1222222800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2045 (or 2034 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 1222222800 is about 34960.3032023465. The cubic root of 1222222800 is about 1069.1782784751.

The spelling of 1222222800 in words is "one billion, two hundred twenty-two million, two hundred twenty-two thousand, eight hundred".