21210111100200 has 96 divisors (see below), whose sum is σ = 71728739379360. Its totient is φ = 5141845113600.

The previous prime is 21210111100177. The next prime is 21210111100273. The reversal of 21210111100200 is 200111101212.

It is a super-3 number, since 3×21210111100200³ (a number of 41 digits) contains 333 as substring.

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 (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1606819999 + ... + 1606833198.

It is an arithmetic number, because the mean of its divisors is an integer number (747174368535).

Almost surely, 2^{21210111100200} is an apocalyptic number.

21210111100200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21210111100200 is an abundant number, since it is smaller than the sum of its proper divisors (50518628279160).

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

21210111100200 is a wasteful number, since it uses less digits than its factorization.

21210111100200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3213653227 (or 3213653218 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21210111100200 its reverse (200111101212), we get a palindrome (21410222201412).

The spelling of 21210111100200 in words is "twenty-one trillion, two hundred ten billion, one hundred eleven million, one hundred thousand, two hundred".