33000313221 has 32 divisors (see below), whose sum is σ = 51080555520. Its totient is φ = 21016627632.

The previous prime is 33000313217. The next prime is 33000313231. The reversal of 33000313221 is 12231300033.

33000313221 is a `hidden beast` number, since 330 + 0 + 0 + 313 + 2 + 21 = 666.

It is not a de Polignac number, because 33000313221 - 2² = 33000313217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 33000313194 and 33000313203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33000313231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 454966 + ... + 522488.

It is an arithmetic number, because the mean of its divisors is an integer number (1596267360).

Almost surely, 2^33000313221 is an apocalyptic number.

It is an amenable number.

33000313221 is a deficient number, since it is larger than the sum of its proper divisors (18080242299).

33000313221 is a wasteful number, since it uses less digits than its factorization.

33000313221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68342 (or 68336 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 33000313221 its reverse (12231300033), we get a palindrome (45231613254).

The spelling of 33000313221 in words is "thirty-three billion, three hundred thirteen thousand, two hundred twenty-one".