4201221243 has 4 divisors (see below), whose sum is σ = 5601628328. Its totient is φ = 2800814160.

The previous prime is 4201221229. The next prime is 4201221253. The reversal of 4201221243 is 3421221024.

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

It is not a de Polignac number, because 4201221243 - 2⁶ = 4201221179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4201221253) 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, 700203538 + ... + 700203543.

It is an arithmetic number, because the mean of its divisors is an integer number (1400407082).

Almost surely, 2^4201221243 is an apocalyptic number.

4201221243 is a deficient number, since it is larger than the sum of its proper divisors (1400407085).

4201221243 is a wasteful number, since it uses less digits than its factorization.

4201221243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1400407084.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 4201221243 is about 64816.8283935584. The cubic root of 4201221243 is about 1613.5850109049.

Adding to 4201221243 its reverse (3421221024), we get a palindrome (7622442267).

The spelling of 4201221243 in words is "four billion, two hundred one million, two hundred twenty-one thousand, two hundred forty-three".