1220202221200 has 60 divisors (see below), whose sum is σ = 2931782070580. Its totient is φ = 488039892480.

The previous prime is 1220202221159. The next prime is 1220202221257. The reversal of 1220202221200 is 21222020221.

It can be written as a sum of positive squares in 6 ways, for example, as 10809345024 + 1209392876176 = 103968^2 + 1099724^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4884946 + ... + 5128654.

Almost surely, 2^{1220202221200} is an apocalyptic number.

1220202221200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220202221200 is an abundant number, since it is smaller than the sum of its proper divisors (1711579849380).

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

1220202221200 is a wasteful number, since it uses less digits than its factorization.

1220202221200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256244 (or 256233 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 1220202221200 its reverse (21222020221), we get a palindrome (1241424241421).

The spelling of 1220202221200 in words is "one trillion, two hundred twenty billion, two hundred two million, two hundred twenty-one thousand, two hundred".