3221111999 has 4 divisors (see below), whose sum is σ = 3681270864. Its totient is φ = 2760953136.

The previous prime is 3221111989. The next prime is 3221112001. The reversal of 3221111999 is 9991111223.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3221111999 - 2¹⁶ = 3221046463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3221111989) 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 3 ways as a sum of consecutive naturals, for example, 230079422 + ... + 230079435.

It is an arithmetic number, because the mean of its divisors is an integer number (920317716).

Almost surely, 2^3221111999 is an apocalyptic number.

3221111999 is a deficient number, since it is larger than the sum of its proper divisors (460158865).

3221111999 is an equidigital number, since it uses as much as digits as its factorization.

3221111999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460158864.

The product of its digits is 8748, while the sum is 38.

The square root of 3221111999 is about 56754.8411943862. The cubic root of 3221111999 is about 1476.8462181365.

The spelling of 3221111999 in words is "three billion, two hundred twenty-one million, one hundred eleven thousand, nine hundred ninety-nine".