242120121 has 8 divisors (see below), whose sum is σ = 323373600. Its totient is φ = 161140032.

The previous prime is 242120113. The next prime is 242120141. The reversal of 242120121 is 121021242.

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

It is not a de Polignac number, because 242120121 - 2³ = 242120113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 242120121.

It is not an unprimeable number, because it can be changed into a prime (242120141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66271 + ... + 69828.

It is an arithmetic number, because the mean of its divisors is an integer number (40421700).

Almost surely, 2^242120121 is an apocalyptic number.

It is an amenable number.

242120121 is a deficient number, since it is larger than the sum of its proper divisors (81253479).

242120121 is a wasteful number, since it uses less digits than its factorization.

242120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136695.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 242120121 is about 15560.2095422909. The cubic root of 242120121 is about 623.2710582134.

Adding to 242120121 its reverse (121021242), we get a palindrome (363141363).

The spelling of 242120121 in words is "two hundred forty-two million, one hundred twenty thousand, one hundred twenty-one".