20212221021200 has 240 divisors, whose sum is σ = 52740481643136. Its totient is φ = 7399658496000.

The previous prime is 20212221021127. The next prime is 20212221021217. The reversal of 20212221021200 is 212012221202.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 348199379 + ... + 348257421.

Almost surely, 2^{20212221021200} is an apocalyptic number.

20212221021200 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 20212221021200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26370240821568).

20212221021200 is an abundant number, since it is smaller than the sum of its proper divisors (32528260621936).

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

20212221021200 is a wasteful number, since it uses less digits than its factorization.

20212221021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58642 (or 58631 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20212221021200 its reverse (212012221202), we get a palindrome (20424233242402).

The spelling of 20212221021200 in words is "twenty trillion, two hundred twelve billion, two hundred twenty-one million, twenty-one thousand, two hundred".