21212200200200 has 48 divisors (see below), whose sum is σ = 50465304217680. Its totient is φ = 8287557284160.

The previous prime is 21212200200151. The next prime is 21212200200209. The reversal of 21212200200200 is 200200221212.

It is not an unprimeable number, because it can be changed into a prime (21212200200209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1233258854 + ... + 1233276053.

It is an arithmetic number, because the mean of its divisors is an integer number (1051360504535).

Almost surely, 2^{21212200200200} is an apocalyptic number.

21212200200200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21212200200200 is an abundant number, since it is smaller than the sum of its proper divisors (29253104017480).

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

21212200200200 is a wasteful number, since it uses less digits than its factorization.

21212200200200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2466534966 (or 2466534957 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21212200200200 its reverse (200200221212), we get a palindrome (21412400421412).

The spelling of 21212200200200 in words is "twenty-one trillion, two hundred twelve billion, two hundred million, two hundred thousand, two hundred".