21300102 has 48 divisors (see below), whose sum is σ = 49423920. Its totient is φ = 6609600.

The previous prime is 21300101. The next prime is 21300113. The reversal of 21300102 is 20100312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21300101) 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, 20352 + ... + 21372.

It is an arithmetic number, because the mean of its divisors is an integer number (1029665).

Almost surely, 2^21300102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21300102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24711960).

21300102 is an abundant number, since it is smaller than the sum of its proper divisors (28123818).

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

21300102 is a wasteful number, since it uses less digits than its factorization.

21300102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109 (or 1106 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 21300102 is about 4615.2033541329. The cubic root of 21300102 is about 277.2004266530.

Adding to 21300102 its reverse (20100312), we get a palindrome (41400414).

The spelling of 21300102 in words is "twenty-one million, three hundred thousand, one hundred two".