133010721 has 16 divisors (see below), whose sum is σ = 200395200. Its totient is φ = 87169824.

The previous prime is 133010707. The next prime is 133010723. The reversal of 133010721 is 127010331.

It is not a de Polignac number, because 133010721 - 2¹⁰ = 133009697 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133010694 and 133010703.

It is not an unprimeable number, because it can be changed into a prime (133010723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40156 + ... + 43341.

It is an arithmetic number, because the mean of its divisors is an integer number (12524700).

Almost surely, 2^133010721 is an apocalyptic number.

It is an amenable number.

133010721 is a deficient number, since it is larger than the sum of its proper divisors (67384479).

133010721 is an equidigital number, since it uses as much as digits as its factorization.

133010721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83565 (or 83559 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 18.

The square root of 133010721 is about 11533.0273996033. The cubic root of 133010721 is about 510.4605873728.

The spelling of 133010721 in words is "one hundred thirty-three million, ten thousand, seven hundred twenty-one".