20112221021200 has 480 divisors, whose sum is σ = 62937275685120. Its totient is φ = 5992627200000.

The previous prime is 20112221021183. The next prime is 20112221021213. The reversal of 20112221021200 is 212012221102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 90101730 + ... + 90324670.

It is an arithmetic number, because the mean of its divisors is an integer number (131119324344).

Almost surely, 2^{20112221021200} is an apocalyptic number.

20112221021200 is a gapful number since it is divisible by the number (20) 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 20112221021200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31468637842560).

20112221021200 is an abundant number, since it is smaller than the sum of its proper divisors (42825054663920).

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

20112221021200 is a wasteful number, since it uses less digits than its factorization.

20112221021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223107 (or 223096 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20112221021200 its reverse (212012221102), we get a palindrome (20324233242302).

The spelling of 20112221021200 in words is "twenty trillion, one hundred twelve billion, two hundred twenty-one million, twenty-one thousand, two hundred".