123031205531432 has 128 divisors (see below), whose sum is σ = 256102576778880. Its totient is φ = 54937225728000.

The previous prime is 123031205531417. The next prime is 123031205531449. The reversal of 123031205531432 is 234135502130321.

It is a junction number, because it is equal to n+sod(n) for n = 123031205531392 and 123031205531401.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21748486748 + ... + 21748492404.

It is an arithmetic number, because the mean of its divisors is an integer number (2000801381085).

Almost surely, 2^{123031205531432} 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 123031205531432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128051288389440).

123031205531432 is an abundant number, since it is smaller than the sum of its proper divisors (133071371247448).

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

123031205531432 is a wasteful number, since it uses less digits than its factorization.

123031205531432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10123 (or 10119 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 35.

Adding to 123031205531432 its reverse (234135502130321), we get a palindrome (357166707661753).

The spelling of 123031205531432 in words is "one hundred twenty-three trillion, thirty-one billion, two hundred five million, five hundred thirty-one thousand, four hundred thirty-two".