121420242 has 32 divisors (see below), whose sum is σ = 278530560. Its totient is φ = 39167280.

The previous prime is 121420231. The next prime is 121420291. The reversal of 121420242 is 242024121.

121420242 is a `hidden beast` number, since 1 + 2 + 1 + 420 + 242 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34593 + ... + 37940.

It is an arithmetic number, because the mean of its divisors is an integer number (8704080).

Almost surely, 2^121420242 is an apocalyptic number.

121420242 is an abundant number, since it is smaller than the sum of its proper divisors (157110318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121420242 is a wasteful number, since it uses less digits than its factorization.

121420242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72575 (or 72569 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 121420242 is about 11019.0853522423. The cubic root of 121420242 is about 495.1806870212.

Adding to 121420242 its reverse (242024121), we get a palindrome (363444363).

The spelling of 121420242 in words is "one hundred twenty-one million, four hundred twenty thousand, two hundred forty-two".