123234131111 has 16 divisors (see below), whose sum is σ = 151845035328. Its totient is φ = 97393190400.

The previous prime is 123234131101. The next prime is 123234131117. The reversal of 123234131111 is 111131432321.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123234131111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123234131117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 688400 + ... + 848741.

It is an arithmetic number, because the mean of its divisors is an integer number (9490314708).

Almost surely, 2^123234131111 is an apocalyptic number.

123234131111 is a deficient number, since it is larger than the sum of its proper divisors (28610904217).

123234131111 is a wasteful number, since it uses less digits than its factorization.

123234131111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1538042.

The product of its digits is 432, while the sum is 23.

Adding to 123234131111 its reverse (111131432321), we get a palindrome (234365563432).

The spelling of 123234131111 in words is "one hundred twenty-three billion, two hundred thirty-four million, one hundred thirty-one thousand, one hundred eleven".