33023221221 has 16 divisors (see below), whose sum is σ = 46032255360. Its totient is φ = 21058262720.

The previous prime is 33023221213. The next prime is 33023221237. The reversal of 33023221221 is 12212232033.

It is a happy number.

It is not a de Polignac number, because 33023221221 - 2³ = 33023221213 is a prime.

It is a super-2 number, since 2×33023221221² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33023221271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 415860 + ... + 488861.

It is an arithmetic number, because the mean of its divisors is an integer number (2877015960).

Almost surely, 2^33023221221 is an apocalyptic number.

It is an amenable number.

33023221221 is a deficient number, since it is larger than the sum of its proper divisors (13009034139).

33023221221 is an frugal number, since it uses more digits than its factorization.

33023221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904793 (or 904747 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 33023221221 its reverse (12212232033), we get a palindrome (45235453254).

The spelling of 33023221221 in words is "thirty-three billion, twenty-three million, two hundred twenty-one thousand, two hundred twenty-one".