2221220212200 has 144 divisors (see below), whose sum is σ = 8137743213600. Its totient is φ = 538477622400.

The previous prime is 2221220212187. The next prime is 2221220212207. The reversal of 2221220212200 is 22120221222.

2221220212200 is a `hidden beast` number, since 2 + 221 + 220 + 2 + 1 + 220 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (2221220212207) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 56071620 + ... + 56111219.

It is an arithmetic number, because the mean of its divisors is an integer number (56512105650).

Almost surely, 2^{2221220212200} is an apocalyptic number.

2221220212200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221220212200 is an abundant number, since it is smaller than the sum of its proper divisors (5916523001400).

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

2221220212200 is a wasteful number, since it uses less digits than its factorization.

2221220212200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112182872 (or 112182860 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 2221220212200 its reverse (22120221222), we get a palindrome (2243340433422).

The spelling of 2221220212200 in words is "two trillion, two hundred twenty-one billion, two hundred twenty million, two hundred twelve thousand, two hundred".