33131121 has 8 divisors (see below), whose sum is σ = 44497824. Its totient is φ = 21925920.

The previous prime is 33131107. The next prime is 33131149. The reversal of 33131121 is 12113133.

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

It is not a de Polignac number, because 33131121 - 2⁵ = 33131089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 33131121.

It is not an unprimeable number, because it can be changed into a prime (33131191) 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, 39895 + ... + 40716.

It is an arithmetic number, because the mean of its divisors is an integer number (5562228).

Almost surely, 2^33131121 is an apocalyptic number.

It is an amenable number.

33131121 is a deficient number, since it is larger than the sum of its proper divisors (11366703).

33131121 is a wasteful number, since it uses less digits than its factorization.

33131121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80751.

The product of its digits is 54, while the sum is 15.

The square root of 33131121 is about 5755.9639505473. The cubic root of 33131121 is about 321.1776949214.

Adding to 33131121 its reverse (12113133), we get a palindrome (45244254).

The spelling of 33131121 in words is "thirty-three million, one hundred thirty-one thousand, one hundred twenty-one".