13221201109 has 2 divisors, whose sum is σ = 13221201110. Its totient is φ = 13221201108.

The previous prime is 13221201047. The next prime is 13221201127. The reversal of 13221201109 is 90110212231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12711435025 + 509766084 = 112745^2 + 22578^2 .

It is a cyclic number.

It is not a de Polignac number, because 13221201109 - 2¹³ = 13221192917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13221201109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13221201139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610600554 + 6610600555.

It is an arithmetic number, because the mean of its divisors is an integer number (6610600555).

Almost surely, 2^13221201109 is an apocalyptic number.

It is an amenable number.

13221201109 is a deficient number, since it is larger than the sum of its proper divisors (1).

13221201109 is an equidigital number, since it uses as much as digits as its factorization.

13221201109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

The spelling of 13221201109 in words is "thirteen billion, two hundred twenty-one million, two hundred one thousand, one hundred nine".