131011400243220 has 576 divisors, whose sum is σ = 438134483324160. Its totient is φ = 29157291491328.

The previous prime is 131011400243153. The next prime is 131011400243239. The reversal of 131011400243220 is 22342004110131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 6797655504 + ... + 6797674776.

It is an arithmetic number, because the mean of its divisors is an integer number (760650144660).

Almost surely, 2^{131011400243220} is an apocalyptic number.

131011400243220 is a gapful number since it is divisible by the number (10) 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 131011400243220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219067241662080).

131011400243220 is an abundant number, since it is smaller than the sum of its proper divisors (307123083080940).

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

131011400243220 is a wasteful number, since it uses less digits than its factorization.

131011400243220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19784 (or 19775 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 131011400243220 its reverse (22342004110131), we get a palindrome (153353404353351).

The spelling of 131011400243220 in words is "one hundred thirty-one trillion, eleven billion, four hundred million, two hundred forty-three thousand, two hundred twenty".