133221023 has 8 divisors (see below), whose sum is σ = 143691408. Its totient is φ = 122782464.

The previous prime is 133221019. The next prime is 133221029. The reversal of 133221023 is 320122331.

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 133221023 - 2² = 133221019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133220992 and 133221010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133221029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1136 + ... + 16362.

It is an arithmetic number, because the mean of its divisors is an integer number (17961426).

Almost surely, 2^133221023 is an apocalyptic number.

133221023 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

133221023 is a deficient number, since it is larger than the sum of its proper divisors (10470385).

133221023 is a wasteful number, since it uses less digits than its factorization.

133221023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15913.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 133221023 is about 11542.1411791747. The cubic root of 133221023 is about 510.7294738558.

Adding to 133221023 its reverse (320122331), we get a palindrome (453343354).

The spelling of 133221023 in words is "one hundred thirty-three million, two hundred twenty-one thousand, twenty-three".