123012435231532 has 72 divisors (see below), whose sum is σ = 277813688483520. Its totient is φ = 47114602043040.

The previous prime is 123012435231481. The next prime is 123012435231589. The reversal of 123012435231532 is 235132534210321.

It is a junction number, because it is equal to n+sod(n) for n = 123012435231491 and 123012435231500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 483397038 + ... + 483651445.

It is an arithmetic number, because the mean of its divisors is an integer number (3858523451160).

Almost surely, 2^{123012435231532} is an apocalyptic number.

It is an amenable number.

123012435231532 is an abundant number, since it is smaller than the sum of its proper divisors (154801253251988).

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

123012435231532 is a wasteful number, since it uses less digits than its factorization.

123012435231532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967048571 (or 967048562 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 37.

Adding to 123012435231532 its reverse (235132534210321), we get a palindrome (358144969441853).

The spelling of 123012435231532 in words is "one hundred twenty-three trillion, twelve billion, four hundred thirty-five million, two hundred thirty-one thousand, five hundred thirty-two".