242111104021 has 4 divisors (see below), whose sum is σ = 242164331500. Its totient is φ = 242057876544.

The previous prime is 242111103991. The next prime is 242111104031. The reversal of 242111104021 is 120401111242.

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 133141792996 + 108969311025 = 364886^2 + 330105^2 .

It is a cyclic number.

It is not a de Polignac number, because 242111104021 - 2⁷ = 242111103893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 242111104021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242111104031) 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, 26606916 + ... + 26616013.

It is an arithmetic number, because the mean of its divisors is an integer number (60541082875).

Almost surely, 2^242111104021 is an apocalyptic number.

It is an amenable number.

242111104021 is a deficient number, since it is larger than the sum of its proper divisors (53227479).

242111104021 is an equidigital number, since it uses as much as digits as its factorization.

242111104021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53227478.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 242111104021 its reverse (120401111242), we get a palindrome (362512215263).

The spelling of 242111104021 in words is "two hundred forty-two billion, one hundred eleven million, one hundred four thousand, twenty-one".