21301310231100 has 216 divisors, whose sum is σ = 68328927418752. Its totient is φ = 5547564892800.

The previous prime is 21301310231059. The next prime is 21301310231101. The reversal of 21301310231100 is 113201310312.

21301310231100 is a `hidden beast` number, since 2 + 1 + 301 + 31 + 0 + 231 + 100 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21301310231101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 364950519 + ... + 365008881.

Almost surely, 2^{21301310231100} is an apocalyptic number.

21301310231100 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 21301310231100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34164463709376).

21301310231100 is an abundant number, since it is smaller than the sum of its proper divisors (47027617187652).

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

21301310231100 is a wasteful number, since it uses less digits than its factorization.

21301310231100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67857 (or 67847 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21301310231100 its reverse (113201310312), we get a palindrome (21414511541412).

The spelling of 21301310231100 in words is "twenty-one trillion, three hundred one billion, three hundred ten million, two hundred thirty-one thousand, one hundred".