33102121 has 4 divisors (see below), whose sum is σ = 35648452. Its totient is φ = 30555792.

The previous prime is 33102109. The next prime is 33102151. The reversal of 33102121 is 12120133.

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 7901721 + 25200400 = 2811^2 + 5020^2 .

It is a cyclic number.

It is not a de Polignac number, because 33102121 - 2⁵ = 33102089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 2546317 = 33102121 / (3 + 3 + 1 + 0 + 2 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33102151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1273146 + ... + 1273171.

It is an arithmetic number, because the mean of its divisors is an integer number (8912113).

Almost surely, 2^33102121 is an apocalyptic number.

It is an amenable number.

33102121 is a deficient number, since it is larger than the sum of its proper divisors (2546331).

33102121 is a wasteful number, since it uses less digits than its factorization.

33102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2546330.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 33102121 is about 5753.4442727813. Note that the first 3 decimals coincide. The cubic root of 33102121 is about 321.0839575552.

Adding to 33102121 its reverse (12120133), we get a palindrome (45222254).

The spelling of 33102121 in words is "thirty-three million, one hundred two thousand, one hundred twenty-one".