1213302321 has 80 divisors (see below), whose sum is σ = 2308331520. Its totient is φ = 616727520.

The previous prime is 1213302289. The next prime is 1213302347. The reversal of 1213302321 is 1232033121.

1213302321 is a `hidden beast` number, since 12 + 1 + 330 + 2 + 321 = 666.

It is not a de Polignac number, because 1213302321 - 2⁵ = 1213302289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213302294 and 1213302303.

It is not an unprimeable number, because it can be changed into a prime (1213302421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 291070 + ... + 295208.

It is an arithmetic number, because the mean of its divisors is an integer number (28854144).

Almost surely, 2^1213302321 is an apocalyptic number.

1213302321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1213302321 is a deficient number, since it is larger than the sum of its proper divisors (1095029199).

1213302321 is a wasteful number, since it uses less digits than its factorization.

1213302321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4216 (or 4207 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1213302321 is about 34832.4894459182. The cubic root of 1213302321 is about 1066.5707668449.

Adding to 1213302321 its reverse (1232033121), we get a palindrome (2445335442).

The spelling of 1213302321 in words is "one billion, two hundred thirteen million, three hundred two thousand, three hundred twenty-one".