21320212300 has 18 divisors (see below), whose sum is σ = 46264860908. Its totient is φ = 8528084880.

The previous prime is 21320212279. The next prime is 21320212301. The reversal of 21320212300 is 321202312.

It is not an unprimeable number, because it can be changed into a prime (21320212301) 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 5 ways as a sum of consecutive naturals, for example, 106600962 + ... + 106601161.

Almost surely, 2^21320212300 is an apocalyptic number.

21320212300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21320212300 is an abundant number, since it is smaller than the sum of its proper divisors (24944648608).

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

21320212300 is a wasteful number, since it uses less digits than its factorization.

21320212300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213202137 (or 213202130 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21320212300 its reverse (321202312), we get a palindrome (21641414612).

The spelling of 21320212300 in words is "twenty-one billion, three hundred twenty million, two hundred twelve thousand, three hundred".