1131243442040 has 64 divisors (see below), whose sum is σ = 2657372961600. Its totient is φ = 432593784832.

The previous prime is 1131243442027. The next prime is 1131243442061. The reversal of 1131243442040 is 402443421311.

It is a junction number, because it is equal to n+sod(n) for n = 1131243441994 and 1131243442012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1412414 + ... + 2063346.

It is an arithmetic number, because the mean of its divisors is an integer number (41521452525).

Almost surely, 2^{1131243442040} is an apocalyptic number.

1131243442040 is a gapful number since it is divisible by the number (10) 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 1131243442040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1328686480800).

1131243442040 is an abundant number, since it is smaller than the sum of its proper divisors (1526129519560).

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

1131243442040 is a wasteful number, since it uses less digits than its factorization.

1131243442040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652856 (or 652852 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 1131243442040 its reverse (402443421311), we get a palindrome (1533686863351).

The spelling of 1131243442040 in words is "one trillion, one hundred thirty-one billion, two hundred forty-three million, four hundred forty-two thousand, forty".