1231132304440 has 32 divisors (see below), whose sum is σ = 2932991668080. Its totient is φ = 463485102592.

The previous prime is 1231132304417. The next prime is 1231132304443. The reversal of 1231132304440 is 444032311321.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1231132304399 and 1231132304408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231132304443) 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, 905243662 + ... + 905245021.

Almost surely, 2^{1231132304440} is an apocalyptic number.

1231132304440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231132304440 is an abundant number, since it is smaller than the sum of its proper divisors (1701859363640).

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

1231132304440 is a wasteful number, since it uses less digits than its factorization.

1231132304440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810488711 (or 1810488707 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 1231132304440 its reverse (444032311321), we get a palindrome (1675164615761).

The spelling of 1231132304440 in words is "one trillion, two hundred thirty-one billion, one hundred thirty-two million, three hundred four thousand, four hundred forty".