131323103123220 has 144 divisors (see below), whose sum is σ = 401054087043792. Its totient is φ = 34782235852800.

The previous prime is 131323103123189. The next prime is 131323103123227. The reversal of 131323103123220 is 22321301323131.

131323103123220 is a `hidden beast` number, since 1 + 3 + 1 + 3 + 2 + 310 + 3 + 123 + 220 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 16999491825936 + 114323611297284 = 4123044^2 + 10692222^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131323103123227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12913684 + ... + 20722196.

It is an arithmetic number, because the mean of its divisors is an integer number (2785097826693).

Almost surely, 2^{131323103123220} is an apocalyptic number.

131323103123220 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 131323103123220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200527043521896).

131323103123220 is an abundant number, since it is smaller than the sum of its proper divisors (269730983920572).

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

131323103123220 is a wasteful number, since it uses less digits than its factorization.

131323103123220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7809162 (or 7809157 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 131323103123220 its reverse (22321301323131), we get a palindrome (153644404446351).

The spelling of 131323103123220 in words is "one hundred thirty-one trillion, three hundred twenty-three billion, one hundred three million, one hundred twenty-three thousand, two hundred twenty".