3201211220 has 12 divisors (see below), whose sum is σ = 6722543604. Its totient is φ = 1280484480.

The previous prime is 3201211217. The next prime is 3201211241. The reversal of 3201211220 is 221121023.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2409239056 + 791972164 = 49084^2 + 28142^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3201211195 and 3201211204.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 80030261 + ... + 80030300.

It is an arithmetic number, because the mean of its divisors is an integer number (560211967).

Almost surely, 2^3201211220 is an apocalyptic number.

It is an amenable number.

3201211220 is an abundant number, since it is smaller than the sum of its proper divisors (3521332384).

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

3201211220 is a wasteful number, since it uses less digits than its factorization.

3201211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160060570 (or 160060568 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 3201211220 is about 56579.2472555088. The cubic root of 3201211220 is about 1473.7984998630.

Adding to 3201211220 its reverse (221121023), we get a palindrome (3422332243).

The spelling of 3201211220 in words is "three billion, two hundred one million, two hundred eleven thousand, two hundred twenty".