2220021121200 has 120 divisors (see below), whose sum is σ = 7217609227968. Its totient is φ = 583169706240.

The previous prime is 2220021121193. The next prime is 2220021121207. The reversal of 2220021121200 is 21211200222.

It is an interprime number because it is at equal distance from previous prime (2220021121193) and next prime (2220021121207).

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 2220021121200.

It is not an unprimeable number, because it can be changed into a prime (2220021121207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13725702 + ... + 13886501.

Almost surely, 2^{2220021121200} is an apocalyptic number.

2220021121200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2220021121200 is an abundant number, since it is smaller than the sum of its proper divisors (4997588106768).

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

2220021121200 is a wasteful number, since it uses less digits than its factorization.

2220021121200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27612291 (or 27612280 counting only the distinct ones).

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

Adding to 2220021121200 its reverse (21211200222), we get a palindrome (2241232321422).

The spelling of 2220021121200 in words is "two trillion, two hundred twenty billion, twenty-one million, one hundred twenty-one thousand, two hundred".