1231113112110 has 120 divisors (see below), whose sum is σ = 3850787940120. Its totient is φ = 281397273696.

The previous prime is 1231113112007. The next prime is 1231113112111. The reversal of 1231113112110 is 112113111321.

1231113112110 is a `hidden beast` number, since 1 + 231 + 11 + 311 + 2 + 110 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231113112111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 15469420 + ... + 15548799.

It is an arithmetic number, because the mean of its divisors is an integer number (32089899501).

Almost surely, 2^{1231113112110} is an apocalyptic number.

1231113112110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231113112110 is an abundant number, since it is smaller than the sum of its proper divisors (2619674828010).

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

1231113112110 is a wasteful number, since it uses less digits than its factorization.

1231113112110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31018252 (or 31018236 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

Adding to 1231113112110 its reverse (112113111321), we get a palindrome (1343226223431).

The spelling of 1231113112110 in words is "one trillion, two hundred thirty-one billion, one hundred thirteen million, one hundred twelve thousand, one hundred ten".