21221130300 has 36 divisors (see below), whose sum is σ = 61399804536. Its totient is φ = 5658968000.

The previous prime is 21221130253. The next prime is 21221130313. The reversal of 21221130300 is 303112212.

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 21221130300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35368251 + ... + 35368850.

It is an arithmetic number, because the mean of its divisors is an integer number (1705550126).

Almost surely, 2^21221130300 is an apocalyptic number.

21221130300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21221130300 is an abundant number, since it is smaller than the sum of its proper divisors (40178674236).

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

21221130300 is a wasteful number, since it uses less digits than its factorization.

21221130300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70737118 (or 70737111 counting only the distinct ones).

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

Adding to 21221130300 its reverse (303112212), we get a palindrome (21524242512).

The spelling of 21221130300 in words is "twenty-one billion, two hundred twenty-one million, one hundred thirty thousand, three hundred".