131212313420144 has 120 divisors (see below), whose sum is σ = 282073832838000. Its totient is φ = 59079083514880.

The previous prime is 131212313420143. The next prime is 131212313420183. The reversal of 131212313420144 is 441024313212131.

It is a super-2 number, since 2×131212313420144² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131212313420144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131212313420143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2951686622 + ... + 2951731074.

It is an arithmetic number, because the mean of its divisors is an integer number (2350615273650).

Almost surely, 2^{131212313420144} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131212313420144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141036916419000).

131212313420144 is an abundant number, since it is smaller than the sum of its proper divisors (150861519417856).

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

131212313420144 is a wasteful number, since it uses less digits than its factorization.

131212313420144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58839 (or 58822 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

Adding to 131212313420144 its reverse (441024313212131), we get a palindrome (572236626632275).

The spelling of 131212313420144 in words is "one hundred thirty-one trillion, two hundred twelve billion, three hundred thirteen million, four hundred twenty thousand, one hundred forty-four".