1222213200 has 120 divisors (see below), whose sum is σ = 4216375968. Its totient is φ = 300848640.

The previous prime is 1222213199. The next prime is 1222213219. The reversal of 1222213200 is 23122221.

It is a happy number.

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

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 1222213200.

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, 23574 + ... + 54773.

Almost surely, 2^1222213200 is an apocalyptic number.

1222213200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222213200 is an abundant number, since it is smaller than the sum of its proper divisors (2994162768).

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

1222213200 is a wasteful number, since it uses less digits than its factorization.

1222213200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78381 (or 78370 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1222213200 is about 34960.1659034965. The cubic root of 1222213200 is about 1069.1754791660.

Adding to 1222213200 its reverse (23122221), we get a palindrome (1245335421).

The spelling of 1222213200 in words is "one billion, two hundred twenty-two million, two hundred thirteen thousand, two hundred".