1304122221 has 32 divisors (see below), whose sum is σ = 1956787200. Its totient is φ = 858351600.

The previous prime is 1304122217. The next prime is 1304122231. The reversal of 1304122221 is 1222214031.

It is a happy number.

1304122221 is a `hidden beast` number, since 1 + 30 + 412 + 2 + 221 = 666.

It is not a de Polignac number, because 1304122221 - 2² = 1304122217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1304122194 and 1304122203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304122231) 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 in 31 ways as a sum of consecutive naturals, for example, 728890 + ... + 730676.

It is an arithmetic number, because the mean of its divisors is an integer number (61149600).

Almost surely, 2^1304122221 is an apocalyptic number.

It is an amenable number.

1304122221 is a deficient number, since it is larger than the sum of its proper divisors (652664979).

1304122221 is a wasteful number, since it uses less digits than its factorization.

1304122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2126 (or 2120 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1304122221 is about 36112.6324296637. The cubic root of 1304122221 is about 1092.5452460634.

Adding to 1304122221 its reverse (1222214031), we get a palindrome (2526336252).

The spelling of 1304122221 in words is "one billion, three hundred four million, one hundred twenty-two thousand, two hundred twenty-one".