1312231232112 has 80 divisors (see below), whose sum is σ = 3481807343520. Its totient is φ = 425557103616.

The previous prime is 1312231232093. The next prime is 1312231232141. The reversal of 1312231232112 is 2112321322131.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 44720998 + ... + 44750330.

It is an arithmetic number, because the mean of its divisors is an integer number (43522591794).

Almost surely, 2^{1312231232112} is an apocalyptic number.

1312231232112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1312231232112 is an abundant number, since it is smaller than the sum of its proper divisors (2169576111408).

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

1312231232112 is a wasteful number, since it uses less digits than its factorization.

1312231232112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54570 (or 54564 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

Adding to 1312231232112 its reverse (2112321322131), we get a palindrome (3424552554243).

The spelling of 1312231232112 in words is "one trillion, three hundred twelve billion, two hundred thirty-one million, two hundred thirty-two thousand, one hundred twelve".