242002001221 has 4 divisors (see below), whose sum is σ = 242002985472. Its totient is φ = 242001016972.

The previous prime is 242002001207. The next prime is 242002001233. The reversal of 242002001221 is 122100200242.

242002001221 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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 242002001221 - 2¹⁹ = 242001476933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 242002001195 and 242002001204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242002001281) 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, 225660 + ... + 731386.

It is an arithmetic number, because the mean of its divisors is an integer number (60500746368).

Almost surely, 2^242002001221 is an apocalyptic number.

It is an amenable number.

242002001221 is a deficient number, since it is larger than the sum of its proper divisors (984251).

242002001221 is an equidigital number, since it uses as much as digits as its factorization.

242002001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984250.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 242002001221 its reverse (122100200242), we get a palindrome (364102201463).

The spelling of 242002001221 in words is "two hundred forty-two billion, two million, one thousand, two hundred twenty-one".