1222322200 has 96 divisors (see below), whose sum is σ = 3131518320. Its totient is φ = 440000000.

The previous prime is 1222322177. The next prime is 1222322201. The reversal of 1222322200 is 22232221.

It is a super-2 number, since 2×1222322200² = 2988143121225680000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222322201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 219450 + ... + 224950.

Almost surely, 2^1222322200 is an apocalyptic number.

1222322200 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 1222322200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1565759160).

1222322200 is an abundant number, since it is smaller than the sum of its proper divisors (1909196120).

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

1222322200 is a wasteful number, since it uses less digits than its factorization.

1222322200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5629 (or 5620 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 1222322200 is about 34961.7247858283. The cubic root of 1222322200 is about 1069.2072621269.

Adding to 1222322200 its reverse (22232221), we get a palindrome (1244554421).

The spelling of 1222322200 in words is "one billion, two hundred twenty-two million, three hundred twenty-two thousand, two hundred".