3320121221 has 4 divisors (see below), whose sum is σ = 3321335244. Its totient is φ = 3318907200.

The previous prime is 3320121209. The next prime is 3320121239. The reversal of 3320121221 is 1221210233.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1221210233 = 1327 ⋅920279.

It can be written as a sum of positive squares in 2 ways, for example, as 937216996 + 2382904225 = 30614^2 + 48815^2 .

It is a cyclic number.

It is not a de Polignac number, because 3320121221 - 2¹⁰ = 3320120197 is a prime.

It is a super-2 number, since 2×3320121221² = 22046409844269061682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3320121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3320127221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 602900 + ... + 608381.

It is an arithmetic number, because the mean of its divisors is an integer number (830333811).

Almost surely, 2^3320121221 is an apocalyptic number.

It is an amenable number.

3320121221 is a deficient number, since it is larger than the sum of its proper divisors (1214023).

3320121221 is a wasteful number, since it uses less digits than its factorization.

3320121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214022.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 3320121221 is about 57620.4930645339. The cubic root of 3320121221 is about 1491.8253414191.

Adding to 3320121221 its reverse (1221210233), we get a palindrome (4541331454).

The spelling of 3320121221 in words is "three billion, three hundred twenty million, one hundred twenty-one thousand, two hundred twenty-one".