1313021133 has 12 divisors (see below), whose sum is σ = 1897523680. Its totient is φ = 874914696.

The previous prime is 1313021131. The next prime is 1313021137. The reversal of 1313021133 is 3311203131.

It is a happy number.

It is not a de Polignac number, because 1313021133 - 2¹ = 1313021131 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313021131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16273 + ... + 53766.

Almost surely, 2^1313021133 is an apocalyptic number.

It is an amenable number.

1313021133 is a deficient number, since it is larger than the sum of its proper divisors (584502547).

1313021133 is a wasteful number, since it uses less digits than its factorization.

1313021133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72128 (or 72125 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1313021133 is about 36235.6334703838. The cubic root of 1313021133 is about 1095.0246744925.

Adding to 1313021133 its reverse (3311203131), we get a palindrome (4624224264).

The spelling of 1313021133 in words is "one billion, three hundred thirteen million, twenty-one thousand, one hundred thirty-three".