1220002200 has 72 divisors (see below), whose sum is σ = 4097180100. Its totient is φ = 325333440.

The previous prime is 1220002187. The next prime is 1220002219. The reversal of 1220002200 is 22000221.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 337090 + ... + 340689.

Almost surely, 2^1220002200 is an apocalyptic number.

1220002200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220002200 is an abundant number, since it is smaller than the sum of its proper divisors (2877177900).

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

1220002200 is a wasteful number, since it uses less digits than its factorization.

1220002200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677801 (or 677789 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 1220002200 is about 34928.5298860402. The cubic root of 1220002200 is about 1068.5303724341.

Adding to 1220002200 its reverse (22000221), we get a palindrome (1242002421).

The spelling of 1220002200 in words is "one billion, two hundred twenty million, two thousand, two hundred".