242120101 has 4 divisors (see below), whose sum is σ = 250469100. Its totient is φ = 233771104.

The previous prime is 242120093. The next prime is 242120113. The reversal of 242120101 is 101021242.

It is a happy number.

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 107536900 + 134583201 = 10370^2 + 11601^2 .

It is a cyclic number.

It is not a de Polignac number, because 242120101 - 2³ = 242120093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242120141) 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, 4174456 + ... + 4174513.

It is an arithmetic number, because the mean of its divisors is an integer number (62617275).

Almost surely, 2^242120101 is an apocalyptic number.

It is an amenable number.

242120101 is a deficient number, since it is larger than the sum of its proper divisors (8348999).

242120101 is an equidigital number, since it uses as much as digits as its factorization.

242120101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8348998.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 242120101 is about 15560.2088996260. The cubic root of 242120101 is about 623.2710410519.

Adding to 242120101 its reverse (101021242), we get a palindrome (343141343).

It can be divided in two parts, 2421 and 20101, that added together give a palindrome (22522).

The spelling of 242120101 in words is "two hundred forty-two million, one hundred twenty thousand, one hundred one".