33221013021 has 96 divisors (see below), whose sum is σ = 56436936192. Its totient is φ = 18442252800.

The previous prime is 33221012983. The next prime is 33221013041. The reversal of 33221013021 is 12031012233.

It is not a de Polignac number, because 33221013021 - 2¹⁰ = 33221011997 is a prime.

It is a super-2 number, since 2×33221013021² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33221012985 and 33221013003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33221013041) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 113382151 + ... + 113382443.

It is an arithmetic number, because the mean of its divisors is an integer number (587884752).

Almost surely, 2^33221013021 is an apocalyptic number.

It is an amenable number.

33221013021 is a deficient number, since it is larger than the sum of its proper divisors (23215923171).

33221013021 is a wasteful number, since it uses less digits than its factorization.

33221013021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683 (or 680 counting only the distinct ones).

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

Adding to 33221013021 its reverse (12031012233), we get a palindrome (45252025254).

The spelling of 33221013021 in words is "thirty-three billion, two hundred twenty-one million, thirteen thousand, twenty-one".