2012221243 has 4 divisors (see below), whose sum is σ = 2024270640. Its totient is φ = 2000171848.

The previous prime is 2012221229. The next prime is 2012221259. The reversal of 2012221243 is 3421222102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3421222102 = 2 ⋅1710611051.

It is a cyclic number.

It is not a de Polignac number, because 2012221243 - 2⁹ = 2012220731 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2012221243.

It is not an unprimeable number, because it can be changed into a prime (2012221223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6024448 + ... + 6024781.

It is an arithmetic number, because the mean of its divisors is an integer number (506067660).

Almost surely, 2^2012221243 is an apocalyptic number.

2012221243 is a deficient number, since it is larger than the sum of its proper divisors (12049397).

2012221243 is a wasteful number, since it uses less digits than its factorization.

2012221243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12049396.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2012221243 is about 44857.7891006679. The cubic root of 2012221243 is about 1262.4821405571.

Adding to 2012221243 its reverse (3421222102), we get a palindrome (5433443345).

The spelling of 2012221243 in words is "two billion, twelve million, two hundred twenty-one thousand, two hundred forty-three".