21312300103320 has 512 divisors, whose sum is σ = 71923396608000. Its totient is φ = 5027303546880.

The previous prime is 21312300103313. The next prime is 21312300103321. The reversal of 21312300103320 is 2330100321312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21312300103321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 309651871 + ... + 309720689.

It is an arithmetic number, because the mean of its divisors is an integer number (140475384000).

Almost surely, 2^{21312300103320} is an apocalyptic number.

21312300103320 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 21312300103320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35961698304000).

21312300103320 is an abundant number, since it is smaller than the sum of its proper divisors (50611096504680).

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

21312300103320 is a wasteful number, since it uses less digits than its factorization.

21312300103320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69023 (or 69019 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21312300103320 its reverse (2330100321312), we get a palindrome (23642400424632).

The spelling of 21312300103320 in words is "twenty-one trillion, three hundred twelve billion, three hundred million, one hundred three thousand, three hundred twenty".