1220221012200 has 96 divisors (see below), whose sum is σ = 4005196061760. Its totient is φ = 306251545600.

The previous prime is 1220221012193. The next prime is 1220221012243. The reversal of 1220221012200 is 22101220221.

It is a super-2 number, since 2×1220221012200² (a number of 25 digits) contains 22 as substring.

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 1220221012200.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59804556 + ... + 59824955.

It is an arithmetic number, because the mean of its divisors is an integer number (41720792310).

Almost surely, 2^{1220221012200} is an apocalyptic number.

1220221012200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220221012200 is an abundant number, since it is smaller than the sum of its proper divisors (2784975049560).

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

1220221012200 is a wasteful number, since it uses less digits than its factorization.

1220221012200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119629547 (or 119629538 counting only the distinct ones).

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

Adding to 1220221012200 its reverse (22101220221), we get a palindrome (1242322232421).

The spelling of 1220221012200 in words is "one trillion, two hundred twenty billion, two hundred twenty-one million, twelve thousand, two hundred".