1220220211200 has 156 divisors (see below), whose sum is σ = 4034369977248. Its totient is φ = 325391974400.

The previous prime is 1220220211181. The next prime is 1220220211219. The reversal of 1220220211200 is 21120220221.

It is an interprime number because it is at equal distance from previous prime (1220220211181) and next prime (1220220211219).

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 1220220211200.

It is a congruent number.

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, 1678836 + ... + 2293235.

It is an arithmetic number, because the mean of its divisors is an integer number (25861346008).

Almost surely, 2^{1220220211200} is an apocalyptic number.

1220220211200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220220211200 is an abundant number, since it is smaller than the sum of its proper divisors (2814149766048).

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

1220220211200 is an equidigital number, since it uses as much as digits as its factorization.

1220220211200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3972108 (or 3972081 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1220220211200 its reverse (21120220221), we get a palindrome (1241340431421).

The spelling of 1220220211200 in words is "one trillion, two hundred twenty billion, two hundred twenty million, two hundred eleven thousand, two hundred".