13103130231221 has 2 divisors, whose sum is σ = 13103130231222. Its totient is φ = 13103130231220.

The previous prime is 13103130231187. The next prime is 13103130231227. The reversal of 13103130231221 is 12213203130131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12892508896996 + 210621334225 = 3590614^2 + 458935^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13103130231221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13103130231227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6551565115610 + 6551565115611.

It is an arithmetic number, because the mean of its divisors is an integer number (6551565115611).

Almost surely, 2^{13103130231221} is an apocalyptic number.

It is an amenable number.

13103130231221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13103130231221 is an equidigital number, since it uses as much as digits as its factorization.

13103130231221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 13103130231221 its reverse (12213203130131), we get a palindrome (25316333361352).

The spelling of 13103130231221 in words is "thirteen trillion, one hundred three billion, one hundred thirty million, two hundred thirty-one thousand, two hundred twenty-one".