33321213220 has 24 divisors (see below), whose sum is σ = 69983827704. Its totient is φ = 13326717696.

The previous prime is 33321213193. The next prime is 33321213251. The reversal of 33321213220 is 2231212333.

It can be written as a sum of positive squares in 4 ways, for example, as 934891776 + 32386321444 = 30576^2 + 179962^2 .

It is a super-2 number, since 2×33321213220² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33321213191 and 33321213200.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49774 + ... + 262906.

It is an arithmetic number, because the mean of its divisors is an integer number (2915992821).

Almost surely, 2^33321213220 is an apocalyptic number.

It is an amenable number.

33321213220 is an abundant number, since it is smaller than the sum of its proper divisors (36662614484).

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

33321213220 is a wasteful number, since it uses less digits than its factorization.

33321213220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220959 (or 220957 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 33321213220 its reverse (2231212333), we get a palindrome (35552425553).

The spelling of 33321213220 in words is "thirty-three billion, three hundred twenty-one million, two hundred thirteen thousand, two hundred twenty".