21042111300 has 288 divisors, whose sum is σ = 70918294272. Its totient is φ = 4717854720.

The previous prime is 21042111289. The next prime is 21042111323. The reversal of 21042111300 is 311124012.

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 21042111300.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 48595884 + ... + 48596316.

Almost surely, 2^21042111300 is an apocalyptic number.

21042111300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21042111300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35459147136).

21042111300 is an abundant number, since it is smaller than the sum of its proper divisors (49876182972).

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

21042111300 is a wasteful number, since it uses less digits than its factorization.

21042111300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847 (or 840 counting only the distinct ones).

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

Adding to 21042111300 its reverse (311124012), we get a palindrome (21353235312).

The spelling of 21042111300 in words is "twenty-one billion, forty-two million, one hundred eleven thousand, three hundred".