21310103123221 has 8 divisors (see below), whose sum is σ = 23258460708000. Its totient is φ = 19363591452240.

The previous prime is 21310103123203. The next prime is 21310103123261. The reversal of 21310103123221 is 12232130101312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21310103123221 - 2¹¹ = 21310103121173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21310103123192 and 21310103123201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21310103123261) 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 7 ways as a sum of consecutive naturals, for example, 461454306 + ... + 461500483.

It is an arithmetic number, because the mean of its divisors is an integer number (2907307588500).

Almost surely, 2^{21310103123221} is an apocalyptic number.

It is an amenable number.

21310103123221 is a deficient number, since it is larger than the sum of its proper divisors (1948357584779).

21310103123221 is a wasteful number, since it uses less digits than its factorization.

21310103123221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922956899.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21310103123221 its reverse (12232130101312), we get a palindrome (33542233224533).

The spelling of 21310103123221 in words is "twenty-one trillion, three hundred ten billion, one hundred three million, one hundred twenty-three thousand, two hundred twenty-one".