1221002220200 has 48 divisors (see below), whose sum is σ = 3244377331680. Its totient is φ = 418629332160.

The previous prime is 1221002220181. The next prime is 1221002220247. The reversal of 1221002220200 is 20222001221.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 436070822 + ... + 436073621.

It is an arithmetic number, because the mean of its divisors is an integer number (67591194410).

Almost surely, 2^{1221002220200} is an apocalyptic number.

1221002220200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221002220200 is an abundant number, since it is smaller than the sum of its proper divisors (2023375111480).

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

1221002220200 is a wasteful number, since it uses less digits than its factorization.

1221002220200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872144466 (or 872144457 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 1221002220200 its reverse (20222001221), we get a palindrome (1241224221421).

The spelling of 1221002220200 in words is "one trillion, two hundred twenty-one billion, two million, two hundred twenty thousand, two hundred".