133013221 has 8 divisors (see below), whose sum is σ = 145201824. Its totient is φ = 120840720.

The previous prime is 133013213. The next prime is 133013249. The reversal of 133013221 is 122310331.

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

It is not a de Polignac number, because 133013221 - 2³ = 133013213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133013195 and 133013204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133013521) 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 7 ways as a sum of consecutive naturals, for example, 19015 + ... + 25051.

It is an arithmetic number, because the mean of its divisors is an integer number (18150228).

Almost surely, 2^133013221 is an apocalyptic number.

133013221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

133013221 is a deficient number, since it is larger than the sum of its proper divisors (12188603).

133013221 is a wasteful number, since it uses less digits than its factorization.

133013221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8051.

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

The square root of 133013221 is about 11533.1357834719. The cubic root of 133013221 is about 510.4637854695.

Adding to 133013221 its reverse (122310331), we get a palindrome (255323552).

The spelling of 133013221 in words is "one hundred thirty-three million, thirteen thousand, two hundred twenty-one".