242013221 has 4 divisors (see below), whose sum is σ = 246115200. Its totient is φ = 237911244.

The previous prime is 242013197. The next prime is 242013223. The reversal of 242013221 is 122310242.

242013221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 242013221 - 2¹⁴ = 241996837 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 242013221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242013223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2050901 + ... + 2051018.

It is an arithmetic number, because the mean of its divisors is an integer number (61528800).

Almost surely, 2^242013221 is an apocalyptic number.

It is an amenable number.

242013221 is a deficient number, since it is larger than the sum of its proper divisors (4101979).

242013221 is an equidigital number, since it uses as much as digits as its factorization.

242013221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4101978.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 242013221 is about 15556.7741193346. The cubic root of 242013221 is about 623.1793165825.

Adding to 242013221 its reverse (122310242), we get a palindrome (364323463).

The spelling of 242013221 in words is "two hundred forty-two million, thirteen thousand, two hundred twenty-one".