242421211 has 4 divisors (see below), whose sum is σ = 243690624. Its totient is φ = 241151800.

The previous prime is 242421199. The next prime is 242421227. The reversal of 242421211 is 112124242.

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

It is a cyclic number.

It is not a de Polignac number, because 242421211 - 2⁹ = 242420699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242421811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 634420 + ... + 634801.

It is an arithmetic number, because the mean of its divisors is an integer number (60922656).

Almost surely, 2^242421211 is an apocalyptic number.

242421211 is a deficient number, since it is larger than the sum of its proper divisors (1269413).

242421211 is a wasteful number, since it uses less digits than its factorization.

242421211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269412.

The product of its digits is 256, while the sum is 19.

The square root of 242421211 is about 15569.8815345525. The cubic root of 242421211 is about 623.5293087420.

Adding to 242421211 its reverse (112124242), we get a palindrome (354545453).

The spelling of 242421211 in words is "two hundred forty-two million, four hundred twenty-one thousand, two hundred eleven".