1304016221 has 2 divisors, whose sum is σ = 1304016222. Its totient is φ = 1304016220.

The previous prime is 1304016191. The next prime is 1304016251. The reversal of 1304016221 is 1226104031.

It is a balanced prime because it is at equal distance from previous prime (1304016191) and next prime (1304016251).

It can be written as a sum of positive squares in only one way, i.e., 1273490596 + 30525625 = 35686^2 + 5525^2 .

It is a cyclic number.

It is not a de Polignac number, because 1304016221 - 2¹⁰ = 1304015197 is a prime.

It is a super-2 number, since 2×1304016221² = 3400916609262241682, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1304016193 and 1304016202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1304016251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652008110 + 652008111.

It is an arithmetic number, because the mean of its divisors is an integer number (652008111).

Almost surely, 2^1304016221 is an apocalyptic number.

It is an amenable number.

1304016221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1304016221 is an equidigital number, since it uses as much as digits as its factorization.

1304016221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1304016221 is about 36111.1647693618. The cubic root of 1304016221 is about 1092.5156443047.

The spelling of 1304016221 in words is "one billion, three hundred four million, sixteen thousand, two hundred twenty-one".