21113013300 has 72 divisors (see below), whose sum is σ = 63742961856. Its totient is φ = 5385346560.

The previous prime is 21113013281. The next prime is 21113013301. The reversal of 21113013300 is 331031112.

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 21113013300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113013301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1523029 + ... + 1536828.

Almost surely, 2^21113013300 is an apocalyptic number.

21113013300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21113013300 is an abundant number, since it is smaller than the sum of its proper divisors (42629948556).

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

21113013300 is a wasteful number, since it uses less digits than its factorization.

21113013300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3059897 (or 3059890 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 21113013300 its reverse (331031112), we get a palindrome (21444044412).

The spelling of 21113013300 in words is "twenty-one billion, one hundred thirteen million, thirteen thousand, three hundred".