1231124111440 has 40 divisors (see below), whose sum is σ = 2986814153088. Its totient is φ = 471038789760.

The previous prime is 1231124111431. The next prime is 1231124111447. The reversal of 1231124111440 is 441114211321.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231124111447) 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 7 ways as a sum of consecutive naturals, for example, 334542756 + ... + 334546435.

Almost surely, 2^{1231124111440} is an apocalyptic number.

1231124111440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231124111440 is an abundant number, since it is smaller than the sum of its proper divisors (1755690041648).

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

1231124111440 is a wasteful number, since it uses less digits than its factorization.

1231124111440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669089227 (or 669089221 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

Adding to 1231124111440 its reverse (441114211321), we get a palindrome (1672238322761).

The spelling of 1231124111440 in words is "one trillion, two hundred thirty-one billion, one hundred twenty-four million, one hundred eleven thousand, four hundred forty".