242123052421 has 4 divisors (see below), whose sum is σ = 243748039500. Its totient is φ = 240498065344.

The previous prime is 242123052419. The next prime is 242123052463. The reversal of 242123052421 is 124250321242.

242123052421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 19324892196 + 222798160225 = 139014^2 + 472015^2 .

It is a cyclic number.

It is not a de Polignac number, because 242123052421 - 2¹ = 242123052419 is a prime.

It is a super-2 number, since 2×242123052421² (a number of 24 digits) contains 22 as substring.

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 242123052421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242123052121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 812493316 + ... + 812493613.

It is an arithmetic number, because the mean of its divisors is an integer number (60937009875).

Almost surely, 2^242123052421 is an apocalyptic number.

It is an amenable number.

242123052421 is a deficient number, since it is larger than the sum of its proper divisors (1624987079).

242123052421 is a wasteful number, since it uses less digits than its factorization.

242123052421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624987078.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 242123052421 its reverse (124250321242), we get a palindrome (366373373663).

The spelling of 242123052421 in words is "two hundred forty-two billion, one hundred twenty-three million, fifty-two thousand, four hundred twenty-one".