20021200211200 has 54 divisors (see below), whose sum is σ = 49555598851094. Its totient is φ = 8008480081920.

The previous prime is 20021200211101. The next prime is 20021200211209. The reversal of 20021200211200 is 211200212002.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2681104958464 + 17340095252736 = 1637408^2 + 4164144^2 .

It is a super-4 number, since 4×20021200211200⁴ (a number of 54 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021200211209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1564149867 + ... + 1564162666.

Almost surely, 2^{20021200211200} is an apocalyptic number.

20021200211200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021200211200 is an abundant number, since it is smaller than the sum of its proper divisors (29534398639894).

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

20021200211200 is an equidigital number, since it uses as much as digits as its factorization.

20021200211200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3128312559 (or 3128312540 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20021200211200 its reverse (211200212002), we get a palindrome (20232400423202).

The spelling of 20021200211200 in words is "twenty trillion, twenty-one billion, two hundred million, two hundred eleven thousand, two hundred".