123421123535104 has 144 divisors (see below), whose sum is σ = 252427421917440. Its totient is φ = 60213104640000.

The previous prime is 123421123535081. The next prime is 123421123535251. The reversal of 123421123535104 is 401535321124321.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 638395254 + ... + 638588554.

It is an arithmetic number, because the mean of its divisors is an integer number (1752968207760).

Almost surely, 2^{123421123535104} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123421123535104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126213710958720).

123421123535104 is an abundant number, since it is smaller than the sum of its proper divisors (129006298382336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123421123535104 is a wasteful number, since it uses less digits than its factorization.

123421123535104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193768 (or 193754 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

Adding to 123421123535104 its reverse (401535321124321), we get a palindrome (524956444659425).

The spelling of 123421123535104 in words is "one hundred twenty-three trillion, four hundred twenty-one billion, one hundred twenty-three million, five hundred thirty-five thousand, one hundred four".