242134221 has 8 divisors (see below), whose sum is σ = 368966464. Its totient is φ = 138362400.

The previous prime is 242134187. The next prime is 242134223. The reversal of 242134221 is 122431242.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-242134221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 11530201 = 242134221 / (2 + 4 + 2 + 1 + 3 + 4 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242134223) 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 7 ways as a sum of consecutive naturals, for example, 5765080 + ... + 5765121.

It is an arithmetic number, because the mean of its divisors is an integer number (46120808).

Almost surely, 2^242134221 is an apocalyptic number.

242134221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

242134221 is a deficient number, since it is larger than the sum of its proper divisors (126832243).

242134221 is a wasteful number, since it uses less digits than its factorization.

242134221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11530211.

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

The square root of 242134221 is about 15560.6626144262. The cubic root of 242134221 is about 623.2831568242.

Adding to 242134221 its reverse (122431242), we get a palindrome (364565463).

The spelling of 242134221 in words is "two hundred forty-two million, one hundred thirty-four thousand, two hundred twenty-one".