21110120100200 has 96 divisors (see below), whose sum is σ = 52680041665560. Its totient is φ = 7838471577600.

The previous prime is 21110120100197. The next prime is 21110120100227. The reversal of 21110120100200 is 200102101112.

It can be written as a sum of positive squares in 12 ways, for example, as 6002921407396 + 15107198692804 = 2450086^2 + 3886798^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42278231 + ... + 42774630.

Almost surely, 2^{21110120100200} is an apocalyptic number.

21110120100200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21110120100200 is an abundant number, since it is smaller than the sum of its proper divisors (31569921565360).

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

21110120100200 is a wasteful number, since it uses less digits than its factorization.

21110120100200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85052967 (or 85052958 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21110120100200 its reverse (200102101112), we get a palindrome (21310222201312).

The spelling of 21110120100200 in words is "twenty-one trillion, one hundred ten billion, one hundred twenty million, one hundred thousand, two hundred".