33212322220 has 96 divisors (see below), whose sum is σ = 87240384000. Its totient is φ = 10318026240.

The previous prime is 33212322211. The next prime is 33212322229. The reversal of 33212322220 is 2222321233.

It is an interprime number because it is at equal distance from previous prime (33212322211) and next prime (33212322229).

It is a super-2 number, since 2×33212322220² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 33212322191 and 33212322200.

It is not an unprimeable number, because it can be changed into a prime (33212322229) 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, 437656 + ... + 507904.

It is an arithmetic number, because the mean of its divisors is an integer number (908754000).

Almost surely, 2^33212322220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33212322220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43620192000).

33212322220 is an abundant number, since it is smaller than the sum of its proper divisors (54028061780).

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

33212322220 is a wasteful number, since it uses less digits than its factorization.

33212322220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70583 (or 70581 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 33212322220 its reverse (2222321233), we get a palindrome (35434643453).

The spelling of 33212322220 in words is "thirty-three billion, two hundred twelve million, three hundred twenty-two thousand, two hundred twenty".