20212120200 has 96 divisors (see below), whose sum is σ = 65955376800. Its totient is φ = 5106216960.

The previous prime is 20212120193. The next prime is 20212120223. The reversal of 20212120200 is 202121202.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 875097 + ... + 897896.

It is an arithmetic number, because the mean of its divisors is an integer number (687035175).

Almost surely, 2^20212120200 is an apocalyptic number.

20212120200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20212120200 is an abundant number, since it is smaller than the sum of its proper divisors (45743256600).

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

20212120200 is a wasteful number, since it uses less digits than its factorization.

20212120200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1773031 (or 1773022 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20212120200 its reverse (202121202), we get a palindrome (20414241402).

20212120200 divided by its reverse (202121202) gives a square (100 = 10²).

The spelling of 20212120200 in words is "twenty billion, two hundred twelve million, one hundred twenty thousand, two hundred".