33013121 has 4 divisors (see below), whose sum is σ = 33780912. Its totient is φ = 32245332.

The previous prime is 33013087. The next prime is 33013147. The reversal of 33013121 is 12131033.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12131033 = 3467 ⋅3499.

It is a cyclic number.

It is not a de Polignac number, because 33013121 - 2¹⁰ = 33012097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33013096 and 33013105.

It is not an unprimeable number, because it can be changed into a prime (33013151) 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, 383831 + ... + 383916.

It is an arithmetic number, because the mean of its divisors is an integer number (8445228).

Almost surely, 2^33013121 is an apocalyptic number.

It is an amenable number.

33013121 is a deficient number, since it is larger than the sum of its proper divisors (767791).

33013121 is an equidigital number, since it uses as much as digits as its factorization.

33013121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767790.

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

The square root of 33013121 is about 5745.7045695023. The cubic root of 33013121 is about 320.7959385362.

Adding to 33013121 its reverse (12131033), we get a palindrome (45144154).

The spelling of 33013121 in words is "thirty-three million, thirteen thousand, one hundred twenty-one".