33031121 has 4 divisors (see below), whose sum is σ = 33923892. Its totient is φ = 32138352.

The previous prime is 33031109. The next prime is 33031129. The reversal of 33031121 is 12113033.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12113033 = 31 ⋅390743.

It can be written as a sum of positive squares in 2 ways, for example, as 28472896 + 4558225 = 5336^2 + 2135^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33031121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33031096 and 33031105.

It is not an unprimeable number, because it can be changed into a prime (33031129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 446330 + ... + 446403.

It is an arithmetic number, because the mean of its divisors is an integer number (8480973).

Almost surely, 2^33031121 is an apocalyptic number.

It is an amenable number.

33031121 is a deficient number, since it is larger than the sum of its proper divisors (892771).

33031121 is an equidigital number, since it uses as much as digits as its factorization.

33031121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892770.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 33031121 is about 5747.2707435791. The cubic root of 33031121 is about 320.8542312956.

Adding to 33031121 its reverse (12113033), we get a palindrome (45144154).

The spelling of 33031121 in words is "thirty-three million, thirty-one thousand, one hundred twenty-one".