131223212112 has 80 divisors (see below), whose sum is σ = 357424424960. Its totient is φ = 41370466176.

The previous prime is 131223212089. The next prime is 131223212123. The reversal of 131223212112 is 211212322131.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 435063 + ... + 672105.

It is an arithmetic number, because the mean of its divisors is an integer number (4467805312).

Almost surely, 2^131223212112 is an apocalyptic number.

131223212112 is a gapful number since it is divisible by the number (12) 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 131223212112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178712212480).

131223212112 is an abundant number, since it is smaller than the sum of its proper divisors (226201212848).

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

131223212112 is a wasteful number, since it uses less digits than its factorization.

131223212112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237680 (or 237674 counting only the distinct ones).

The product of its digits is 288, while the sum is 21.

Adding to 131223212112 its reverse (211212322131), we get a palindrome (342435534243).

The spelling of 131223212112 in words is "one hundred thirty-one billion, two hundred twenty-three million, two hundred twelve thousand, one hundred twelve".