123111011130312 has 128 divisors (see below), whose sum is σ = 326342837208960. Its totient is φ = 38568479846400.

The previous prime is 123111011130311. The next prime is 123111011130347. The reversal of 123111011130312 is 213031110111321.

It is not an unprimeable number, because it can be changed into a prime (123111011130311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1333290898 + ... + 1333383230.

It is an arithmetic number, because the mean of its divisors is an integer number (2549553415695).

Almost surely, 2^{123111011130312} is an apocalyptic number.

123111011130312 is a gapful number since it is divisible by the number (12) 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 123111011130312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163171418604480).

123111011130312 is an abundant number, since it is smaller than the sum of its proper divisors (203231826078648).

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

123111011130312 is a wasteful number, since it uses less digits than its factorization.

123111011130312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96943 (or 96939 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 21.

Adding to 123111011130312 its reverse (213031110111321), we get a palindrome (336142121241633).

The spelling of 123111011130312 in words is "one hundred twenty-three trillion, one hundred eleven billion, eleven million, one hundred thirty thousand, three hundred twelve".