13210002101221 has 4 divisors (see below), whose sum is σ = 13212044154700. Its totient is φ = 13207960047744.

The previous prime is 13210002101203. The next prime is 13210002101243. The reversal of 13210002101221 is 12210120001231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1026900516321 + 12183101584900 = 1013361^2 + 3490430^2 .

It is a cyclic number.

It is not a de Polignac number, because 13210002101221 - 2⁹ = 13210002100709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13210002101195 and 13210002101204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13210002101201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1021017036 + ... + 1021029973.

It is an arithmetic number, because the mean of its divisors is an integer number (3303011038675).

Almost surely, 2^{13210002101221} is an apocalyptic number.

It is an amenable number.

13210002101221 is a deficient number, since it is larger than the sum of its proper divisors (2042053479).

13210002101221 is an equidigital number, since it uses as much as digits as its factorization.

13210002101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2042053478.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 13210002101221 its reverse (12210120001231), we get a palindrome (25420122102452).

The spelling of 13210002101221 in words is "thirteen trillion, two hundred ten billion, two million, one hundred one thousand, two hundred twenty-one".