133012311 has 4 divisors (see below), whose sum is σ = 177349752. Its totient is φ = 88674872.

The previous prime is 133012309. The next prime is 133012333. The reversal of 133012311 is 113210331.

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

It is a cyclic number.

It is not a de Polignac number, because 133012311 - 2¹ = 133012309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133012211) 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 3 ways as a sum of consecutive naturals, for example, 22168716 + ... + 22168721.

It is an arithmetic number, because the mean of its divisors is an integer number (44337438).

Almost surely, 2^133012311 is an apocalyptic number.

133012311 is a deficient number, since it is larger than the sum of its proper divisors (44337441).

133012311 is an equidigital number, since it uses as much as digits as its factorization.

133012311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44337440.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 133012311 is about 11533.0963318616. The cubic root of 133012311 is about 510.4626213670.

Adding to 133012311 its reverse (113210331), we get a palindrome (246222642).

The spelling of 133012311 in words is "one hundred thirty-three million, twelve thousand, three hundred eleven".