1220231212200 has 3072 divisors, whose sum is σ = 6119608320000. Its totient is φ = 219469824000.

The previous prime is 1220231212181. The next prime is 1220231212229. The reversal of 1220231212200 is 22121320221.

1220231212200 is a `hidden beast` number, since 1 + 2 + 20 + 231 + 212 + 200 = 666.

It is a super-2 number, since 2×1220231212200² (a number of 25 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 767 ways as a sum of consecutive naturals, for example, 4502698065 + ... + 4502698335.

It is an arithmetic number, because the mean of its divisors is an integer number (1992060000).

Almost surely, 2^{1220231212200} is an apocalyptic number.

1220231212200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220231212200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3059804160000).

1220231212200 is an abundant number, since it is smaller than the sum of its proper divisors (4899377107800).

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

1220231212200 is a wasteful number, since it uses less digits than its factorization.

1220231212200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358 (or 329 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 1220231212200 its reverse (22121320221), we get a palindrome (1242352532421).

The spelling of 1220231212200 in words is "one trillion, two hundred twenty billion, two hundred thirty-one million, two hundred twelve thousand, two hundred".