1212633305 has 12 divisors (see below), whose sum is σ = 1575706860. Its totient is φ = 895482432.

The previous prime is 1212633283. The next prime is 1212633329. The reversal of 1212633305 is 5033362121.

It can be written as a sum of positive squares in 6 ways, for example, as 222964624 + 989668681 = 14932^2 + 31459^2 .

It is not a de Polignac number, because 1212633305 - 2⁶ = 1212633241 is a prime.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 716690 + ... + 718379.

It is an arithmetic number, because the mean of its divisors is an integer number (131308905).

Almost surely, 2^1212633305 is an apocalyptic number.

It is an amenable number.

1212633305 is a deficient number, since it is larger than the sum of its proper divisors (363073555).

1212633305 is a wasteful number, since it uses less digits than its factorization.

1212633305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1435100 (or 1435087 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 1212633305 is about 34822.8847885984. The cubic root of 1212633305 is about 1066.3746947730.

Adding to 1212633305 its reverse (5033362121), we get a palindrome (6245995426).

The spelling of 1212633305 in words is "one billion, two hundred twelve million, six hundred thirty-three thousand, three hundred five".