21202323121300 has 144 divisors (see below), whose sum is σ = 48161512965888. Its totient is φ = 8095627584000.

The previous prime is 21202323121297. The next prime is 21202323121327. The reversal of 21202323121300 is 312132320212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31471582 + ... + 32138218.

It is an arithmetic number, because the mean of its divisors is an integer number (334454951152).

Almost surely, 2^{21202323121300} is an apocalyptic number.

21202323121300 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 21202323121300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24080756482944).

21202323121300 is an abundant number, since it is smaller than the sum of its proper divisors (26959189844588).

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

21202323121300 is a wasteful number, since it uses less digits than its factorization.

21202323121300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666866 (or 666859 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21202323121300 its reverse (312132320212), we get a palindrome (21514455441512).

The spelling of 21202323121300 in words is "twenty-one trillion, two hundred two billion, three hundred twenty-three million, one hundred twenty-one thousand, three hundred".