21122110200 has 96 divisors (see below), whose sum is σ = 66871791360. Its totient is φ = 5512713600.

The previous prime is 21122110199. The next prime is 21122110277. The reversal of 21122110200 is 201122112.

It is a super-2 number, since 2×21122110200² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

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, 346306 + ... + 402705.

It is an arithmetic number, because the mean of its divisors is an integer number (696581160).

Almost surely, 2^21122110200 is an apocalyptic number.

21122110200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21122110200 is an abundant number, since it is smaller than the sum of its proper divisors (45749681160).

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

21122110200 is a wasteful number, since it uses less digits than its factorization.

21122110200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749077 (or 749068 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21122110200 its reverse (201122112), we get a palindrome (21323232312).

The spelling of 21122110200 in words is "twenty-one billion, one hundred twenty-two million, one hundred ten thousand, two hundred".