133111312 has 20 divisors (see below), whose sum is σ = 261754576. Its totient is φ = 65561760.

The previous prime is 133111301. The next prime is 133111331. The reversal of 133111312 is 213111331.

It is a super-2 number, since 2×133111312² = 35437242764722688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61014 + ... + 63157.

Almost surely, 2^133111312 is an apocalyptic number.

It is an amenable number.

133111312 is a deficient number, since it is larger than the sum of its proper divisors (128643264).

133111312 is a wasteful number, since it uses less digits than its factorization.

133111312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124246 (or 124240 counting only the distinct ones).

The product of its digits is 54, while the sum is 16.

The square root of 133111312 is about 11537.3875725833. The cubic root of 133111312 is about 510.5892356548.

Adding to 133111312 its reverse (213111331), we get a palindrome (346222643).

The spelling of 133111312 in words is "one hundred thirty-three million, one hundred eleven thousand, three hundred twelve".