33210031221 has 12 divisors (see below), whose sum is σ = 48211103200. Its totient is φ = 22028763240.

The previous prime is 33210031213. The next prime is 33210031237. The reversal of 33210031221 is 12213001233.

33210031221 is a `hidden beast` number, since 332 + 1 + 0 + 0 + 312 + 21 = 666.

It is not a de Polignac number, because 33210031221 - 2³ = 33210031213 is a prime.

It is a super-2 number, since 2×33210031221² (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 = 33210031194 and 33210031203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33210031241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9269575 + ... + 9273156.

Almost surely, 2^33210031221 is an apocalyptic number.

It is an amenable number.

33210031221 is a deficient number, since it is larger than the sum of its proper divisors (15001071979).

33210031221 is a wasteful number, since it uses less digits than its factorization.

33210031221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18542936 (or 18542933 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 33210031221 its reverse (12213001233), we get a palindrome (45423032454).

The spelling of 33210031221 in words is "thirty-three billion, two hundred ten million, thirty-one thousand, two hundred twenty-one".