133231012 has 12 divisors (see below), whose sum is σ = 233335116. Its totient is φ = 66563840.

The previous prime is 133231009. The next prime is 133231013. The reversal of 133231012 is 210132331.

133231012 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 63107136 + 70123876 = 7944^2 + 8374^2 .

It is not an unprimeable number, because it can be changed into a prime (133231013) 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, 6793 + ... + 17680.

It is an arithmetic number, because the mean of its divisors is an integer number (19444593).

Almost surely, 2^133231012 is an apocalyptic number.

It is an amenable number.

133231012 is a deficient number, since it is larger than the sum of its proper divisors (100104104).

133231012 is a wasteful number, since it uses less digits than its factorization.

133231012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25838 (or 25836 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 133231012 is about 11542.5738897353. The cubic root of 133231012 is about 510.7422384808.

Adding to 133231012 its reverse (210132331), we get a palindrome (343363343).

The spelling of 133231012 in words is "one hundred thirty-three million, two hundred thirty-one thousand, twelve".