1213330305 has 32 divisors (see below), whose sum is σ = 2133089280. Its totient is φ = 584038080.

The previous prime is 1213330303. The next prime is 1213330351. The reversal of 1213330305 is 5030333121.

It is not a de Polignac number, because 1213330305 - 2¹ = 1213330303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213330303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3517 + ... + 49386.

It is an arithmetic number, because the mean of its divisors is an integer number (66659040).

Almost surely, 2^1213330305 is an apocalyptic number.

1213330305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1213330305 is a deficient number, since it is larger than the sum of its proper divisors (919758975).

1213330305 is a wasteful number, since it uses less digits than its factorization.

1213330305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53061.

The product of its (nonzero) digits is 810, while the sum is 21.

The square root of 1213330305 is about 34832.8911375441. The cubic root of 1213330305 is about 1066.5789666937.

Adding to 1213330305 its reverse (5030333121), we get a palindrome (6243663426).

The spelling of 1213330305 in words is "one billion, two hundred thirteen million, three hundred thirty thousand, three hundred five".