242002230521 has 4 divisors (see below), whose sum is σ = 242153389044. Its totient is φ = 241851072000.

The previous prime is 242002230497. The next prime is 242002230583. The reversal of 242002230521 is 125032200242.

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

It can be written as a sum of positive squares in 2 ways, for example, as 130555755625 + 111446474896 = 361325^2 + 333836^2 .

It is a cyclic number.

It is not a de Polignac number, because 242002230521 - 2²⁶ = 241935121657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (242002230121) 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, 75576860 + ... + 75580061.

It is an arithmetic number, because the mean of its divisors is an integer number (60538347261).

Almost surely, 2^242002230521 is an apocalyptic number.

It is an amenable number.

242002230521 is a deficient number, since it is larger than the sum of its proper divisors (151158523).

242002230521 is a wasteful number, since it uses less digits than its factorization.

242002230521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151158522.

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 242002230521 its reverse (125032200242), we get a palindrome (367034430763).

The spelling of 242002230521 in words is "two hundred forty-two billion, two million, two hundred thirty thousand, five hundred twenty-one".