1312221133 has 8 divisors (see below), whose sum is σ = 1325737088. Its totient is φ = 1298720304.

The previous prime is 1312221083. The next prime is 1312221151. The reversal of 1312221133 is 3311222131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312221133 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1312221133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312221233) 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 7 ways as a sum of consecutive naturals, for example, 270235 + ... + 275047.

It is an arithmetic number, because the mean of its divisors is an integer number (165717136).

Almost surely, 2^1312221133 is an apocalyptic number.

It is an amenable number.

1312221133 is a deficient number, since it is larger than the sum of its proper divisors (13515955).

1312221133 is a wasteful number, since it uses less digits than its factorization.

1312221133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7563.

The product of its digits is 216, while the sum is 19.

The square root of 1312221133 is about 36224.5929307701. The cubic root of 1312221133 is about 1094.8022364087.

Adding to 1312221133 its reverse (3311222131), we get a palindrome (4623443264).

It can be divided in two parts, 131222 and 1133, that added together give a triangular number (132355 = T₅₁₄).

The spelling of 1312221133 in words is "one billion, three hundred twelve million, two hundred twenty-one thousand, one hundred thirty-three".