3331311221 has 8 divisors (see below), whose sum is σ = 3864037440. Its totient is φ = 2812791168.

The previous prime is 3331311163. The next prime is 3331311223. The reversal of 3331311221 is 1221131333.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3331311221 - 2¹⁸ = 3331049077 is a prime.

It is a super-2 number, since 2×3331311221² = 22195268902321021682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3331311193 and 3331311202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3331311223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3551036 + ... + 3551973.

It is an arithmetic number, because the mean of its divisors is an integer number (483004680).

Almost surely, 2^3331311221 is an apocalyptic number.

It is an amenable number.

3331311221 is a deficient number, since it is larger than the sum of its proper divisors (532726219).

3331311221 is an equidigital number, since it uses as much as digits as its factorization.

3331311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7103083.

The product of its digits is 324, while the sum is 20.

The square root of 3331311221 is about 57717.5122558137. The cubic root of 3331311221 is about 1493.4994576242.

Adding to 3331311221 its reverse (1221131333), we get a palindrome (4552442554).

The spelling of 3331311221 in words is "three billion, three hundred thirty-one million, three hundred eleven thousand, two hundred twenty-one".