231011123112 has 384 divisors, whose sum is σ = 794783059200. Its totient is φ = 58873651200.

The previous prime is 231011123093. The next prime is 231011123177. The reversal of 231011123112 is 211321110132.

231011123112 is a `hidden beast` number, since 2 + 310 + 111 + 231 + 12 = 666.

It is a super-2 number, since 2×231011123112² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 228950064 + ... + 228951072.

It is an arithmetic number, because the mean of its divisors is an integer number (2069747550).

Almost surely, 2^231011123112 is an apocalyptic number.

231011123112 is a gapful number since it is divisible by the number (22) 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 231011123112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (397391529600).

231011123112 is an abundant number, since it is smaller than the sum of its proper divisors (563771936088).

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

231011123112 is a wasteful number, since it uses less digits than its factorization.

231011123112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1777 (or 1770 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 231011123112 its reverse (211321110132), we get a palindrome (442332233244).

The spelling of 231011123112 in words is "two hundred thirty-one billion, eleven million, one hundred twenty-three thousand, one hundred twelve".