33120233221 has 4 divisors (see below), whose sum is σ = 35068482252. Its totient is φ = 31171984192.

The previous prime is 33120233207. The next prime is 33120233273. The reversal of 33120233221 is 12233202133.

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 29074001121 + 4046232100 = 170511^2 + 63610^2 .

It is a cyclic number.

It is not a de Polignac number, because 33120233221 - 2⁷ = 33120233093 is a prime.

It is a super-2 number, since 2×33120233221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33120233192 and 33120233201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33120233521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 974124490 + ... + 974124523.

It is an arithmetic number, because the mean of its divisors is an integer number (8767120563).

Almost surely, 2^33120233221 is an apocalyptic number.

It is an amenable number.

33120233221 is a deficient number, since it is larger than the sum of its proper divisors (1948249031).

33120233221 is a wasteful number, since it uses less digits than its factorization.

33120233221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1948249030.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 33120233221 its reverse (12233202133), we get a palindrome (45353435354).

The spelling of 33120233221 in words is "thirty-three billion, one hundred twenty million, two hundred thirty-three thousand, two hundred twenty-one".