3221012121 has 4 divisors (see below), whose sum is σ = 4294682832. Its totient is φ = 2147341412.

The previous prime is 3221012101. The next prime is 3221012159. The reversal of 3221012121 is 1212101223.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3221012121 - 2¹⁹ = 3220487833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3221012121.

It is not an unprimeable number, because it can be changed into a prime (3221012101) 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, 536835351 + ... + 536835356.

It is an arithmetic number, because the mean of its divisors is an integer number (1073670708).

Almost surely, 2^3221012121 is an apocalyptic number.

It is an amenable number.

3221012121 is a deficient number, since it is larger than the sum of its proper divisors (1073670711).

3221012121 is a wasteful number, since it uses less digits than its factorization.

3221012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073670710.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 3221012121 is about 56753.9612802490. The cubic root of 3221012121 is about 1476.8309536387.

Adding to 3221012121 its reverse (1212101223), we get a palindrome (4433113344).

The spelling of 3221012121 in words is "three billion, two hundred twenty-one million, twelve thousand, one hundred twenty-one".