21101332200 has 96 divisors (see below), whose sum is σ = 70446012000. Its totient is φ = 5194172160.

The previous prime is 21101332193. The next prime is 21101332201. The reversal of 21101332200 is 223310112.

It is a super-2 number, since 2×21101332200² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21101332200.

It is not an unprimeable number, because it can be changed into a prime (21101332201) by changing a digit.

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, 1344850 + ... + 1360449.

It is an arithmetic number, because the mean of its divisors is an integer number (733812625).

Almost surely, 2^21101332200 is an apocalyptic number.

21101332200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21101332200 is an abundant number, since it is smaller than the sum of its proper divisors (49344679800).

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

21101332200 is a wasteful number, since it uses less digits than its factorization.

21101332200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2705331 (or 2705322 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21101332200 its reverse (223310112), we get a palindrome (21324642312).

The spelling of 21101332200 in words is "twenty-one billion, one hundred one million, three hundred thirty-two thousand, two hundred".