123312432421 has 8 divisors (see below), whose sum is σ = 123998416704. Its totient is φ = 122627406720.

The previous prime is 123312432401. The next prime is 123312432479. The reversal of 123312432421 is 124234213321.

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

It is a cyclic number.

It is not a de Polignac number, because 123312432421 - 2¹⁵ = 123312399653 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 123312432421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123312432401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19125 + ... + 496981.

It is an arithmetic number, because the mean of its divisors is an integer number (15499802088).

Almost surely, 2^123312432421 is an apocalyptic number.

It is an amenable number.

123312432421 is a deficient number, since it is larger than the sum of its proper divisors (685984283).

123312432421 is a wasteful number, since it uses less digits than its factorization.

123312432421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479291.

The product of its digits is 6912, while the sum is 28.

Adding to 123312432421 its reverse (124234213321), we get a palindrome (247546645742).

The spelling of 123312432421 in words is "one hundred twenty-three billion, three hundred twelve million, four hundred thirty-two thousand, four hundred twenty-one".