123031321111156 has 12 divisors (see below), whose sum is σ = 215353054147392. Its totient is φ = 61501877069048.

The previous prime is 123031321111141. The next prime is 123031321111163. The reversal of 123031321111156 is 651111123130321.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3445851550 + ... + 3445887253.

It is an arithmetic number, because the mean of its divisors is an integer number (17946087845616).

Almost surely, 2^{123031321111156} is an apocalyptic number.

It is an amenable number.

123031321111156 is a deficient number, since it is larger than the sum of its proper divisors (92321733036236).

123031321111156 is a wasteful number, since it uses less digits than its factorization.

123031321111156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6891743270 (or 6891743268 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 31.

Adding to 123031321111156 its reverse (651111123130321), we get a palindrome (774142444241477).

The spelling of 123031321111156 in words is "one hundred twenty-three trillion, thirty-one billion, three hundred twenty-one million, one hundred eleven thousand, one hundred fifty-six".