1231532501112 has 48 divisors (see below), whose sum is σ = 3458933882040. Its totient is φ = 410510833056.

The previous prime is 1231532501099. The next prime is 1231532501113. The reversal of 1231532501112 is 2111052351321.

1231532501112 is a `hidden beast` number, since 1 + 2 + 3 + 15 + 32 + 501 + 112 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231532501113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 316750243 + ... + 316754130.

Almost surely, 2^{1231532501112} is an apocalyptic number.

1231532501112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1231532501112 is an abundant number, since it is smaller than the sum of its proper divisors (2227401380928).

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

1231532501112 is an equidigital number, since it uses as much as digits as its factorization.

1231532501112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633504394 (or 633504378 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

Adding to 1231532501112 its reverse (2111052351321), we get a palindrome (3342584852433).

The spelling of 1231532501112 in words is "one trillion, two hundred thirty-one billion, five hundred thirty-two million, five hundred one thousand, one hundred twelve".