133220999 has 8 divisors (see below), whose sum is σ = 134700720. Its totient is φ = 131746176.

The previous prime is 133220987. The next prime is 133221017. The reversal of 133220999 is 999022331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133220999 - 2²⁰ = 132172423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133220599) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85007 + ... + 86559.

It is an arithmetic number, because the mean of its divisors is an integer number (16837590).

Almost surely, 2^133220999 is an apocalyptic number.

133220999 is a deficient number, since it is larger than the sum of its proper divisors (1479721).

133220999 is a wasteful number, since it uses less digits than its factorization.

133220999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2449.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 133220999 is about 11542.1401395062. The cubic root of 133220999 is about 510.7294431862.

The spelling of 133220999 in words is "one hundred thirty-three million, two hundred twenty thousand, nine hundred ninety-nine".