21211002300 has 144 divisors (see below), whose sum is σ = 62313789440. Its totient is φ = 5569724160.

The previous prime is 21211002271. The next prime is 21211002313. The reversal of 21211002300 is 320011212.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10972134 + ... + 10974066.

Almost surely, 2^21211002300 is an apocalyptic number.

21211002300 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 21211002300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31156894720).

21211002300 is an abundant number, since it is smaller than the sum of its proper divisors (41102787140).

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

21211002300 is a wasteful number, since it uses less digits than its factorization.

21211002300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2492 (or 2485 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21211002300 its reverse (320011212), we get a palindrome (21531013512).

The spelling of 21211002300 in words is "twenty-one billion, two hundred eleven million, two thousand, three hundred".