13031221321189 has 2 divisors, whose sum is σ = 13031221321190. Its totient is φ = 13031221321188.

The previous prime is 13031221321141. The next prime is 13031221321213. The reversal of 13031221321189 is 98112312213031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13002586928100 + 28634393089 = 3605910^2 + 169217^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13031221321189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13031221321589) 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 as a sum of consecutive naturals, namely, 6515610660594 + 6515610660595.

It is an arithmetic number, because the mean of its divisors is an integer number (6515610660595).

Almost surely, 2^{13031221321189} is an apocalyptic number.

It is an amenable number.

13031221321189 is a deficient number, since it is larger than the sum of its proper divisors (1).

13031221321189 is an equidigital number, since it uses as much as digits as its factorization.

13031221321189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 37.

The spelling of 13031221321189 in words is "thirteen trillion, thirty-one billion, two hundred twenty-one million, three hundred twenty-one thousand, one hundred eighty-nine".