1331112133 has 4 divisors (see below), whose sum is σ = 1433505388. Its totient is φ = 1228718880.

The previous prime is 1331112073. The next prime is 1331112137. The reversal of 1331112133 is 3312111331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 556157889 + 774954244 = 23583^2 + 27838^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1331112133 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 1331112133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331112137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51196608 + ... + 51196633.

It is an arithmetic number, because the mean of its divisors is an integer number (358376347).

Almost surely, 2^1331112133 is an apocalyptic number.

1331112133 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1331112133 is a deficient number, since it is larger than the sum of its proper divisors (102393255).

1331112133 is a wasteful number, since it uses less digits than its factorization.

1331112133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102393254.

The product of its digits is 162, while the sum is 19.

The square root of 1331112133 is about 36484.4094511615. The cubic root of 1331112133 is about 1100.0308897662.

Adding to 1331112133 its reverse (3312111331), we get a palindrome (4643223464).

The spelling of 1331112133 in words is "one billion, three hundred thirty-one million, one hundred twelve thousand, one hundred thirty-three".