123311404342 has 16 divisors (see below), whose sum is σ = 211567020192. Its totient is φ = 52803734400.

The previous prime is 123311404313. The next prime is 123311404343. The reversal of 123311404342 is 243404113321.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 123311404342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123311404343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3650113 + ... + 3683740.

It is an arithmetic number, because the mean of its divisors is an integer number (13222938762).

Almost surely, 2^123311404342 is an apocalyptic number.

123311404342 is a deficient number, since it is larger than the sum of its proper divisors (88255615850).

123311404342 is a wasteful number, since it uses less digits than its factorization.

123311404342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7335063.

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

Adding to 123311404342 its reverse (243404113321), we get a palindrome (366715517663).

The spelling of 123311404342 in words is "one hundred twenty-three billion, three hundred eleven million, four hundred four thousand, three hundred forty-two".