123342442521 has 8 divisors (see below), whose sum is σ = 165504084864. Its totient is φ = 81704547600.

The previous prime is 123342442453. The next prime is 123342442523. The reversal of 123342442521 is 125244243321.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123342442521 - 2¹³ = 123342434329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123342442523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130936305 + ... + 130937246.

It is an arithmetic number, because the mean of its divisors is an integer number (20688010608).

Almost surely, 2^123342442521 is an apocalyptic number.

It is an amenable number.

123342442521 is a deficient number, since it is larger than the sum of its proper divisors (42161642343).

123342442521 is a wasteful number, since it uses less digits than its factorization.

123342442521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261873711.

The product of its digits is 46080, while the sum is 33.

Adding to 123342442521 its reverse (125244243321), we get a palindrome (248586685842).

The spelling of 123342442521 in words is "one hundred twenty-three billion, three hundred forty-two million, four hundred forty-two thousand, five hundred twenty-one".