123311404342000 has 160 divisors (see below), whose sum is σ = 341046036549504. Its totient is φ = 42242987520000.

The previous prime is 123311404341997. The next prime is 123311404342019. The reversal of 123311404342000 is 243404113321.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 123311404342000.

It is a congruent number.

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, 13147074 + ... + 20480926.

Almost surely, 2^{123311404342000} is an apocalyptic number.

123311404342000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123311404342000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170523018274752).

123311404342000 is an abundant number, since it is smaller than the sum of its proper divisors (217734632207504).

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

123311404342000 is a wasteful number, since it uses less digits than its factorization.

123311404342000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7335084 (or 7335068 counting only the distinct ones).

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

Adding to 123311404342000 its reverse (243404113321), we get a palindrome (123554808455321).

The spelling of 123311404342000 in words is "one hundred twenty-three trillion, three hundred eleven billion, four hundred four million, three hundred forty-two thousand".