13030001221 has 2 divisors, whose sum is σ = 13030001222. Its totient is φ = 13030001220.

The previous prime is 13030001137. The next prime is 13030001233. The reversal of 13030001221 is 12210003031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8689036225 + 4340964996 = 93215^2 + 65886^2 .

It is a cyclic number.

It is not a de Polignac number, because 13030001221 - 2⁷ = 13030001093 is a prime.

It is a super-2 number, since 2×13030001221² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13030001021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6515000610 + 6515000611.

It is an arithmetic number, because the mean of its divisors is an integer number (6515000611).

Almost surely, 2^13030001221 is an apocalyptic number.

It is an amenable number.

13030001221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13030001221 is an equidigital number, since it uses as much as digits as its factorization.

13030001221 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 13.

Adding to 13030001221 its reverse (12210003031), we get a palindrome (25240004252).

The spelling of 13030001221 in words is "thirteen billion, thirty million, one thousand, two hundred twenty-one".