2012221321 has 4 divisors (see below), whose sum is σ = 2195150544. Its totient is φ = 1829292100.

The previous prime is 2012221307. The next prime is 2012221327. The reversal of 2012221321 is 1231222102.

It is a happy number.

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 2012221321 - 2¹¹ = 2012219273 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2012221295 and 2012221304.

It is not an unprimeable number, because it can be changed into a prime (2012221327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91464595 + ... + 91464616.

It is an arithmetic number, because the mean of its divisors is an integer number (548787636).

Almost surely, 2^2012221321 is an apocalyptic number.

It is an amenable number.

2012221321 is a deficient number, since it is larger than the sum of its proper divisors (182929223).

2012221321 is a wasteful number, since it uses less digits than its factorization.

2012221321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182929222.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2012221321 is about 44857.7899700821. The cubic root of 2012221321 is about 1262.4821568697.

Adding to 2012221321 its reverse (1231222102), we get a palindrome (3243443423).

The spelling of 2012221321 in words is "two billion, twelve million, two hundred twenty-one thousand, three hundred twenty-one".