1131031230018 has 32 divisors (see below), whose sum is σ = 2274619620672. Its totient is φ = 374922240000.

The previous prime is 1131031229983. The next prime is 1131031230019. The reversal of 1131031230018 is 8100321301311.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1131031230018.

It is not an unprimeable number, because it can be changed into a prime (1131031230019) 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, 379530 + ... + 1551162.

It is an arithmetic number, because the mean of its divisors is an integer number (71081863146).

Almost surely, 2^{1131031230018} is an apocalyptic number.

1131031230018 is an abundant number, since it is smaller than the sum of its proper divisors (1143588390654).

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

1131031230018 is a wasteful number, since it uses less digits than its factorization.

1131031230018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172530.

The product of its (nonzero) digits is 432, while the sum is 24.

Adding to 1131031230018 its reverse (8100321301311), we get a palindrome (9231352531329).

The spelling of 1131031230018 in words is "one trillion, one hundred thirty-one billion, thirty-one million, two hundred thirty thousand, eighteen".