21012100110300 has 144 divisors (see below), whose sum is σ = 65477632913280. Its totient is φ = 5171728623360.

The previous prime is 21012100110259. The next prime is 21012100110307. The reversal of 21012100110300 is 301100121012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012100110307) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42666871 + ... + 43156529.

It is an arithmetic number, because the mean of its divisors is an integer number (454705784120).

Almost surely, 2^{21012100110300} is an apocalyptic number.

21012100110300 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 21012100110300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32738816456640).

21012100110300 is an abundant number, since it is smaller than the sum of its proper divisors (44465532802980).

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

21012100110300 is a wasteful number, since it uses less digits than its factorization.

21012100110300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500692 (or 500685 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 21012100110300 its reverse (301100121012), we get a palindrome (21313200231312).

The spelling of 21012100110300 in words is "twenty-one trillion, twelve billion, one hundred million, one hundred ten thousand, three hundred".