242211121 has 4 divisors (see below), whose sum is σ = 256458852. Its totient is φ = 227963392.

The previous prime is 242211089. The next prime is 242211127. The reversal of 242211121 is 121112242.

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 91412721 + 150798400 = 9561^2 + 12280^2 .

It is a cyclic number.

It is not a de Polignac number, because 242211121 - 2⁵ = 242211089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 242211095 and 242211104.

It is not an unprimeable number, because it can be changed into a prime (242211127) 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, 7123840 + ... + 7123873.

It is an arithmetic number, because the mean of its divisors is an integer number (64114713).

Almost surely, 2^242211121 is an apocalyptic number.

It is an amenable number.

242211121 is a deficient number, since it is larger than the sum of its proper divisors (14247731).

242211121 is a wasteful number, since it uses less digits than its factorization.

242211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14247730.

The product of its digits is 64, while the sum is 16.

The square root of 242211121 is about 15563.1333927330. The cubic root of 242211121 is about 623.3491331813.

Adding to 242211121 its reverse (121112242), we get a palindrome (363323363).

The spelling of 242211121 in words is "two hundred forty-two million, two hundred eleven thousand, one hundred twenty-one".