3221120785 has 16 divisors (see below), whose sum is σ = 3923960400. Its totient is φ = 2538086400.

The previous prime is 3221120759. The next prime is 3221120869. The reversal of 3221120785 is 5870211223.

It can be written as a sum of positive squares in 8 ways, for example, as 243890689 + 2977230096 = 15617^2 + 54564^2 .

It is not a de Polignac number, because 3221120785 - 2¹⁹ = 3220596497 is a prime.

It is a super-2 number, since 2×3221120785² = 20751238223118032450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80941 + ... + 113989.

It is an arithmetic number, because the mean of its divisors is an integer number (245247525).

Almost surely, 2^3221120785 is an apocalyptic number.

It is an amenable number.

3221120785 is a deficient number, since it is larger than the sum of its proper divisors (702839615).

3221120785 is a wasteful number, since it uses less digits than its factorization.

3221120785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33348.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 3221120785 is about 56754.9185974220. The cubic root of 3221120785 is about 1476.8475608984.

The spelling of 3221120785 in words is "three billion, two hundred twenty-one million, one hundred twenty thousand, seven hundred eighty-five".