21030103321320 has 256 divisors, whose sum is σ = 65544837120000. Its totient is φ = 5392264550400.

The previous prime is 21030103321307. The next prime is 21030103321327. The reversal of 21030103321320 is 2312330103012.

It is not an unprimeable number, because it can be changed into a prime (21030103321327) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 470144716 + ... + 470189444.

It is an arithmetic number, because the mean of its divisors is an integer number (256034520000).

Almost surely, 2^{21030103321320} is an apocalyptic number.

21030103321320 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 21030103321320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32772418560000).

21030103321320 is an abundant number, since it is smaller than the sum of its proper divisors (44514733798680).

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

21030103321320 is a wasteful number, since it uses less digits than its factorization.

21030103321320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45584 (or 45580 counting only the distinct ones).

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

Adding to 21030103321320 its reverse (2312330103012), we get a palindrome (23342433424332).

The spelling of 21030103321320 in words is "twenty-one trillion, thirty billion, one hundred three million, three hundred twenty-one thousand, three hundred twenty".