1321144133 has 8 divisors (see below), whose sum is σ = 1336829208. Its totient is φ = 1305529344.

The previous prime is 1321144129. The next prime is 1321144147. The reversal of 1321144133 is 3314411231.

It can be written as a sum of positive squares in 4 ways, for example, as 693889 + 1320450244 = 833^2 + 36338^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1321144133 - 2² = 1321144129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1321144099 and 1321144108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321144183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20735 + ... + 55427.

It is an arithmetic number, because the mean of its divisors is an integer number (167103651).

Almost surely, 2^1321144133 is an apocalyptic number.

It is an amenable number.

1321144133 is a deficient number, since it is larger than the sum of its proper divisors (15685075).

1321144133 is a wasteful number, since it uses less digits than its factorization.

1321144133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35143.

The product of its digits is 864, while the sum is 23.

The square root of 1321144133 is about 36347.5464508954. The cubic root of 1321144133 is about 1097.2781557370.

Adding to 1321144133 its reverse (3314411231), we get a palindrome (4635555364).

The spelling of 1321144133 in words is "one billion, three hundred twenty-one million, one hundred forty-four thousand, one hundred thirty-three".