242154312101 has 4 divisors (see below), whose sum is σ = 260781566892. Its totient is φ = 223527057312.

The previous prime is 242154312041. The next prime is 242154312131. The reversal of 242154312101 is 101213451242.

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 25744202500 + 216410109601 = 160450^2 + 465199^2 .

It is a de Polignac number, because none of the positive numbers 2^k-242154312101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242154312131) 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, 9313627376 + ... + 9313627401.

It is an arithmetic number, because the mean of its divisors is an integer number (65195391723).

Almost surely, 2^242154312101 is an apocalyptic number.

It is an amenable number.

242154312101 is a deficient number, since it is larger than the sum of its proper divisors (18627254791).

242154312101 is a wasteful number, since it uses less digits than its factorization.

242154312101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18627254790.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 242154312101 its reverse (101213451242), we get a palindrome (343367763343).

The spelling of 242154312101 in words is "two hundred forty-two billion, one hundred fifty-four million, three hundred twelve thousand, one hundred one".