3221121231 has 12 divisors (see below), whose sum is σ = 4657025152. Its totient is φ = 2145432096.

The previous prime is 3221121229. The next prime is 3221121251. The reversal of 3221121231 is 1321211223.

3221121231 is a `hidden beast` number, since 322 + 112 + 1 + 231 = 666.

It is not a de Polignac number, because 3221121231 - 2¹ = 3221121229 is a prime.

It is a super-2 number, since 2×3221121231² = 20751243969597910722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3221121251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154846 + ... + 174411.

Almost surely, 2^3221121231 is an apocalyptic number.

3221121231 is a deficient number, since it is larger than the sum of its proper divisors (1435903921).

3221121231 is a wasteful number, since it uses less digits than its factorization.

3221121231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330350 (or 330347 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 3221121231 is about 56754.9225265968. The cubic root of 3221121231 is about 1476.8476290604.

Adding to 3221121231 its reverse (1321211223), we get a palindrome (4542332454).

The spelling of 3221121231 in words is "three billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred thirty-one".