123143332423442 has 16 divisors (see below), whose sum is σ = 194911771893120. Its totient is φ = 58232899746912.

The previous prime is 123143332423429. The next prime is 123143332423481. The reversal of 123143332423442 is 244324233341321.

It is a super-2 number, since 2×123143332423442² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123143332423442.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15039484478 + ... + 15039492665.

It is an arithmetic number, because the mean of its divisors is an integer number (12181985743320).

Almost surely, 2^{123143332423442} is an apocalyptic number.

123143332423442 is a deficient number, since it is larger than the sum of its proper divisors (71768439469678).

123143332423442 is a wasteful number, since it uses less digits than its factorization.

123143332423442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30078977257.

The product of its digits is 995328, while the sum is 41.

Adding to 123143332423442 its reverse (244324233341321), we get a palindrome (367467565764763).

The spelling of 123143332423442 in words is "one hundred twenty-three trillion, one hundred forty-three billion, three hundred thirty-two million, four hundred twenty-three thousand, four hundred forty-two".