13541322390221 has 2 divisors, whose sum is σ = 13541322390222. Its totient is φ = 13541322390220.

The previous prime is 13541322390209. The next prime is 13541322390229. The reversal of 13541322390221 is 12209322314531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12945244202500 + 596078187721 = 3597950^2 + 772061^2 .

It is an emirp because it is prime and its reverse (12209322314531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13541322390221 - 2¹⁸ = 13541322128077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13541322390229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6770661195110 + 6770661195111.

It is an arithmetic number, because the mean of its divisors is an integer number (6770661195111).

Almost surely, 2^{13541322390221} is an apocalyptic number.

It is an amenable number.

13541322390221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13541322390221 is an equidigital number, since it uses as much as digits as its factorization.

13541322390221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 13541322390221 in words is "thirteen trillion, five hundred forty-one billion, three hundred twenty-two million, three hundred ninety thousand, two hundred twenty-one".