21112010220200 has 96 divisors (see below), whose sum is σ = 50038154432760. Its totient is φ = 8281715097600.

The previous prime is 21112010220173. The next prime is 21112010220239. The reversal of 21112010220200 is 202201021112.

It can be written as a sum of positive squares in 12 ways, for example, as 1019401199716 + 20092609020484 = 1009654^2 + 4482478^2 .

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, 1543904 + ... + 6678896.

Almost surely, 2^{21112010220200} is an apocalyptic number.

21112010220200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21112010220200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25019077216380).

21112010220200 is an abundant number, since it is smaller than the sum of its proper divisors (28926144212560).

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

21112010220200 is a wasteful number, since it uses less digits than its factorization.

21112010220200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5135407 (or 5135398 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21112010220200 its reverse (202201021112), we get a palindrome (21314211241312).

The spelling of 21112010220200 in words is "twenty-one trillion, one hundred twelve billion, ten million, two hundred twenty thousand, two hundred".