21300101003221 has 2 divisors, whose sum is σ = 21300101003222. Its totient is φ = 21300101003220.

The previous prime is 21300101003219. The next prime is 21300101003231. The reversal of 21300101003221 is 12230010100312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15428634084900 + 5871466918321 = 3927930^2 + 2423111^2 .

It is a cyclic number.

It is not a de Polignac number, because 21300101003221 - 2¹ = 21300101003219 is a prime.

Together with 21300101003219, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 21300101003195 and 21300101003204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21300101003201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10650050501610 + 10650050501611.

It is an arithmetic number, because the mean of its divisors is an integer number (10650050501611).

Almost surely, 2^{21300101003221} is an apocalyptic number.

It is an amenable number.

21300101003221 is a deficient number, since it is larger than the sum of its proper divisors (1).

21300101003221 is an equidigital number, since it uses as much as digits as its factorization.

21300101003221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21300101003221 its reverse (12230010100312), we get a palindrome (33530111103533).

The spelling of 21300101003221 in words is "twenty-one trillion, three hundred billion, one hundred one million, three thousand, two hundred twenty-one".