30033121 has 4 divisors (see below), whose sum is σ = 30164500. Its totient is φ = 29901744.

The previous prime is 30033119. The next prime is 30033131. The reversal of 30033121 is 12133003.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25644096 + 4389025 = 5064^2 + 2095^2 .

It is a cyclic number.

It is not a de Polignac number, because 30033121 - 2¹ = 30033119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30033131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65346 + ... + 65803.

It is an arithmetic number, because the mean of its divisors is an integer number (7541125).

Almost surely, 2^30033121 is an apocalyptic number.

It is an amenable number.

30033121 is a deficient number, since it is larger than the sum of its proper divisors (131379).

30033121 is a wasteful number, since it uses less digits than its factorization.

30033121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131378.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 30033121 is about 5480.2482607999. The cubic root of 30033121 is about 310.8375581480.

Adding to 30033121 its reverse (12133003), we get a palindrome (42166124).

The spelling of 30033121 in words is "thirty million, thirty-three thousand, one hundred twenty-one".