21313300000000 has 162 divisors, whose sum is σ = 53179403436194. Its totient is φ = 8525280000000.

The previous prime is 21313299999991. The next prime is 21313300000063. The reversal of 21313300000000 is 331312.

It can be written as a sum of positive squares in 9 ways, for example, as 4705914553344 + 16607385446656 = 2169312^2 + 4075216^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 99893434 + ... + 100106566.

Almost surely, 2^{21313300000000} is an apocalyptic number.

21313300000000 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 21313300000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26589701718097).

21313300000000 is an abundant number, since it is smaller than the sum of its proper divisors (31866103436194).

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

21313300000000 is an frugal number, since it uses more digits than its factorization.

21313300000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213189 (or 213140 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 13.

Adding to 21313300000000 its reverse (331312), we get a palindrome (21313300331312).

The spelling of 21313300000000 in words is "twenty-one trillion, three hundred thirteen billion, three hundred million", and thus it is an aban number.