131122345431220 has 96 divisors (see below), whose sum is σ = 323617109751936. Its totient is φ = 43996651200000.

The previous prime is 131122345431211. The next prime is 131122345431223. The reversal of 131122345431220 is 22134543221131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131122345431223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 906906 + ... + 16219345.

It is an arithmetic number, because the mean of its divisors is an integer number (3371011559916).

Almost surely, 2^{131122345431220} is an apocalyptic number.

131122345431220 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 131122345431220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161808554875968).

131122345431220 is an abundant number, since it is smaller than the sum of its proper divisors (192494764320716).

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

131122345431220 is a wasteful number, since it uses less digits than its factorization.

131122345431220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17128961 (or 17128959 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 131122345431220 its reverse (22134543221131), we get a palindrome (153256888652351).

The spelling of 131122345431220 in words is "one hundred thirty-one trillion, one hundred twenty-two billion, three hundred forty-five million, four hundred thirty-one thousand, two hundred twenty".