21112221300 has 36 divisors (see below), whose sum is σ = 61084694496. Its totient is φ = 5629925600.

The previous prime is 21112221287. The next prime is 21112221311. The reversal of 21112221300 is 312221112.

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 21112221300.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 35186736 + ... + 35187335.

Almost surely, 2^21112221300 is an apocalyptic number.

21112221300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21112221300 is an abundant number, since it is smaller than the sum of its proper divisors (39972473196).

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

21112221300 is a wasteful number, since it uses less digits than its factorization.

21112221300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70374088 (or 70374081 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21112221300 its reverse (312221112), we get a palindrome (21424442412).

The spelling of 21112221300 in words is "twenty-one billion, one hundred twelve million, two hundred twenty-one thousand, three hundred".