33021222210 has 80 divisors (see below), whose sum is σ = 89237016000. Its totient is φ = 8761366944.

The previous prime is 33021222193. The next prime is 33021222211. The reversal of 33021222210 is 1222212033.

33021222210 is a `hidden beast` number, since 330 + 2 + 122 + 2 + 210 = 666.

It is a super-2 number, since 2×33021222210² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (33021222211) 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 39 ways as a sum of consecutive naturals, for example, 58761 + ... + 263619.

It is an arithmetic number, because the mean of its divisors is an integer number (1115462700).

Almost surely, 2^33021222210 is an apocalyptic number.

33021222210 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 33021222210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44618508000).

33021222210 is an abundant number, since it is smaller than the sum of its proper divisors (56215793790).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33021222210 is a wasteful number, since it uses less digits than its factorization.

33021222210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205077 (or 205068 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 33021222210 its reverse (1222212033), we get a palindrome (34243434243).

The spelling of 33021222210 in words is "thirty-three billion, twenty-one million, two hundred twenty-two thousand, two hundred ten".