13964109221 has 2 divisors, whose sum is σ = 13964109222. Its totient is φ = 13964109220.

The previous prime is 13964109149. The next prime is 13964109239. The reversal of 13964109221 is 12290146931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13832112100 + 131997121 = 117610^2 + 11489^2 .

It is a cyclic number.

It is not a de Polignac number, because 13964109221 - 2³⁰ = 12890367397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13964109241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6982054610 + 6982054611.

It is an arithmetic number, because the mean of its divisors is an integer number (6982054611).

Almost surely, 2^13964109221 is an apocalyptic number.

It is an amenable number.

13964109221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13964109221 is an equidigital number, since it uses as much as digits as its factorization.

13964109221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 38.

The spelling of 13964109221 in words is "thirteen billion, nine hundred sixty-four million, one hundred nine thousand, two hundred twenty-one".