21102111300 has 144 divisors (see below), whose sum is σ = 63837914112. Its totient is φ = 5371766400.

The previous prime is 21102111287. The next prime is 21102111337. The reversal of 21102111300 is 311120112.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3771505 + ... + 3777095.

It is an arithmetic number, because the mean of its divisors is an integer number (443318848).

Almost surely, 2^21102111300 is an apocalyptic number.

21102111300 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 21102111300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31918957056).

21102111300 is an abundant number, since it is smaller than the sum of its proper divisors (42735802812).

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

21102111300 is a wasteful number, since it uses less digits than its factorization.

21102111300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6178 (or 6171 counting only the distinct ones).

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

Adding to 21102111300 its reverse (311120112), we get a palindrome (21413231412).

The spelling of 21102111300 in words is "twenty-one billion, one hundred two million, one hundred eleven thousand, three hundred".