123041242421 has 4 divisors (see below), whose sum is σ = 123042223500. Its totient is φ = 123040261344.

The previous prime is 123041242409. The next prime is 123041242459. The reversal of 123041242421 is 124242140321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 47366734321 + 75674508100 = 217639^2 + 275090^2 .

It is a cyclic number.

It is not a de Polignac number, because 123041242421 - 2¹⁰ = 123041241397 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 (123041242921) 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, 269096 + ... + 564353.

It is an arithmetic number, because the mean of its divisors is an integer number (30760555875).

Almost surely, 2^123041242421 is an apocalyptic number.

It is an amenable number.

123041242421 is a deficient number, since it is larger than the sum of its proper divisors (981079).

123041242421 is an equidigital number, since it uses as much as digits as its factorization.

123041242421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981078.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 123041242421 its reverse (124242140321), we get a palindrome (247283382742).

The spelling of 123041242421 in words is "one hundred twenty-three billion, forty-one million, two hundred forty-two thousand, four hundred twenty-one".