10242042421 has 4 divisors (see below), whose sum is σ = 11029891852. Its totient is φ = 9454192992.

The previous prime is 10242042407. The next prime is 10242042431. The reversal of 10242042421 is 12424024201.

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 3604681521 + 6637360900 = 60039^2 + 81470^2 .

It is a cyclic number.

It is not a de Polignac number, because 10242042421 - 2⁵ = 10242042389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10242042392 and 10242042401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10242042431) 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, 393924696 + ... + 393924721.

It is an arithmetic number, because the mean of its divisors is an integer number (2757472963).

Almost surely, 2^10242042421 is an apocalyptic number.

It is an amenable number.

10242042421 is a deficient number, since it is larger than the sum of its proper divisors (787849431).

10242042421 is an equidigital number, since it uses as much as digits as its factorization.

10242042421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787849430.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 10242042421 its reverse (12424024201), we get a palindrome (22666066622).

The spelling of 10242042421 in words is "ten billion, two hundred forty-two million, forty-two thousand, four hundred twenty-one".