1231332133 has 4 divisors (see below), whose sum is σ = 1259967808. Its totient is φ = 1202696460.

The previous prime is 1231332119. The next prime is 1231332169. The reversal of 1231332133 is 3312331321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1231332133 - 2²⁹ = 694461221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231332173) 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 3 ways as a sum of consecutive naturals, for example, 14317773 + ... + 14317858.

It is an arithmetic number, because the mean of its divisors is an integer number (314991952).

Almost surely, 2^1231332133 is an apocalyptic number.

It is an amenable number.

1231332133 is a deficient number, since it is larger than the sum of its proper divisors (28635675).

1231332133 is an equidigital number, since it uses as much as digits as its factorization.

1231332133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28635674.

The product of its digits is 972, while the sum is 22.

The square root of 1231332133 is about 35090.3424463199. The cubic root of 1231332133 is about 1071.8279329184.

Adding to 1231332133 its reverse (3312331321), we get a palindrome (4543663454).

The spelling of 1231332133 in words is "one billion, two hundred thirty-one million, three hundred thirty-two thousand, one hundred thirty-three".