242022121 has 4 divisors (see below), whose sum is σ = 264024144. Its totient is φ = 220020100.

The previous prime is 242022119. The next prime is 242022161. The reversal of 242022121 is 121220242.

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.

It is a cyclic number.

It is not a de Polignac number, because 242022121 - 2¹ = 242022119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 242022095 and 242022104.

It is not an unprimeable number, because it can be changed into a prime (242022101) 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, 11000995 + ... + 11001016.

It is an arithmetic number, because the mean of its divisors is an integer number (66006036).

Almost surely, 2^242022121 is an apocalyptic number.

It is an amenable number.

242022121 is a deficient number, since it is larger than the sum of its proper divisors (22002023).

242022121 is a wasteful number, since it uses less digits than its factorization.

242022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22002022.

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

The square root of 242022121 is about 15557.0601657254. The cubic root of 242022121 is about 623.1869555976.

Adding to 242022121 its reverse (121220242), we get a palindrome (363242363).

It can be divided in two parts, 2420221 and 21, that added together give a palindrome (2420242).

The spelling of 242022121 in words is "two hundred forty-two million, twenty-two thousand, one hundred twenty-one".