3221056121 has 4 divisors (see below), whose sum is σ = 3223961700. Its totient is φ = 3218150544.

The previous prime is 3221056103. The next prime is 3221056211. The reversal of 3221056121 is 1216501223.

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

It can be written as a sum of positive squares in 2 ways, for example, as 608312896 + 2612743225 = 24664^2 + 51115^2 .

It is a cyclic number.

It is not a de Polignac number, because 3221056121 - 2¹⁴ = 3221039737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3221056621) 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, 1451126 + ... + 1453343.

It is an arithmetic number, because the mean of its divisors is an integer number (805990425).

Almost surely, 2^3221056121 is an apocalyptic number.

It is an amenable number.

3221056121 is a deficient number, since it is larger than the sum of its proper divisors (2905579).

3221056121 is a wasteful number, since it uses less digits than its factorization.

3221056121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2905578.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 3221056121 is about 56754.3489170654. The cubic root of 3221056121 is about 1476.8376782606.

Adding to 3221056121 its reverse (1216501223), we get a palindrome (4437557344).

The spelling of 3221056121 in words is "three billion, two hundred twenty-one million, fifty-six thousand, one hundred twenty-one".