13030001001221 has 2 divisors, whose sum is σ = 13030001001222. Its totient is φ = 13030001001220.

The previous prime is 13030001001217. The next prime is 13030001001301. The reversal of 13030001001221 is 12210010003031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11969593284100 + 1060407717121 = 3459710^2 + 1029761^2 .

It is a cyclic number.

It is not a de Polignac number, because 13030001001221 - 2² = 13030001001217 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13030001001196 and 13030001001205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13030001001821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6515000500610 + 6515000500611.

It is an arithmetic number, because the mean of its divisors is an integer number (6515000500611).

Almost surely, 2^{13030001001221} is an apocalyptic number.

It is an amenable number.

13030001001221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13030001001221 is an equidigital number, since it uses as much as digits as its factorization.

13030001001221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 13030001001221 its reverse (12210010003031), we get a palindrome (25240011004252).

The spelling of 13030001001221 in words is "thirteen trillion, thirty billion, one million, one thousand, two hundred twenty-one".