21111011100200 has 48 divisors (see below), whose sum is σ = 56094972355680. Its totient is φ = 7238060948160.

The previous prime is 21111011100187. The next prime is 21111011100229. The reversal of 21111011100200 is 200111011112.

It is a super-2 number, since 2×21111011100200² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7539645422 + ... + 7539648221.

It is an arithmetic number, because the mean of its divisors is an integer number (1168645257410).

Almost surely, 2^{21111011100200} is an apocalyptic number.

21111011100200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21111011100200 is an abundant number, since it is smaller than the sum of its proper divisors (34983961255480).

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

21111011100200 is a wasteful number, since it uses less digits than its factorization.

21111011100200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15079293666 (or 15079293657 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 21111011100200 its reverse (200111011112), we get a palindrome (21311122111312).

The spelling of 21111011100200 in words is "twenty-one trillion, one hundred eleven billion, eleven million, one hundred thousand, two hundred".