20212121332200 has 384 divisors, whose sum is σ = 72287373312000. Its totient is φ = 4576151116800.

The previous prime is 20212121332133. The next prime is 20212121332213. The reversal of 20212121332200 is 223312121202.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 95 ways as a sum of consecutive naturals, for example, 3008200441 + ... + 3008207159.

It is an arithmetic number, because the mean of its divisors is an integer number (188248368000).

Almost surely, 2^{20212121332200} is an apocalyptic number.

20212121332200 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 20212121332200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36143686656000).

20212121332200 is an abundant number, since it is smaller than the sum of its proper divisors (52075251979800).

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

20212121332200 is a wasteful number, since it uses less digits than its factorization.

20212121332200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13425 (or 13416 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 20212121332200 its reverse (223312121202), we get a palindrome (20435433453402).

The spelling of 20212121332200 in words is "twenty trillion, two hundred twelve billion, one hundred twenty-one million, three hundred thirty-two thousand, two hundred".