1231230112011 has 48 divisors (see below), whose sum is σ = 1849716960000. Its totient is φ = 788235779520.

The previous prime is 1231230112003. The next prime is 1231230112051. The reversal of 1231230112011 is 1102110321321.

1231230112011 is a `hidden beast` number, since 1 + 231 + 2 + 301 + 120 + 11 = 666.

It is not a de Polignac number, because 1231230112011 - 2³ = 1231230112003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231230112051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 93559050 + ... + 93572208.

It is an arithmetic number, because the mean of its divisors is an integer number (38535770000).

Almost surely, 2^{1231230112011} is an apocalyptic number.

1231230112011 is a deficient number, since it is larger than the sum of its proper divisors (618486847989).

1231230112011 is a wasteful number, since it uses less digits than its factorization.

1231230112011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15104 (or 15101 counting only the distinct ones).

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

Adding to 1231230112011 its reverse (1102110321321), we get a palindrome (2333340433332).

The spelling of 1231230112011 in words is "one trillion, two hundred thirty-one billion, two hundred thirty million, one hundred twelve thousand, eleven".