21000212220300 has 36 divisors (see below), whose sum is σ = 60760614024936. Its totient is φ = 5600056592000.

The previous prime is 21000212220293. The next prime is 21000212220301. The reversal of 21000212220300 is 302221200012.

It is a happy number.

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 21000212220300.

It is not an unprimeable number, because it can be changed into a prime (21000212220301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35000353401 + ... + 35000354000.

It is an arithmetic number, because the mean of its divisors is an integer number (1687794834026).

Almost surely, 2^{21000212220300} is an apocalyptic number.

21000212220300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21000212220300 is an abundant number, since it is smaller than the sum of its proper divisors (39760401804636).

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

21000212220300 is a wasteful number, since it uses less digits than its factorization.

21000212220300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70000707418 (or 70000707411 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21000212220300 its reverse (302221200012), we get a palindrome (21302433420312).

The spelling of 21000212220300 in words is "twenty-one trillion, two hundred twelve million, two hundred twenty thousand, three hundred".