131000031121340 has 96 divisors (see below), whose sum is σ = 286896095640000. Its totient is φ = 50183147169792.

The previous prime is 131000031121339. The next prime is 131000031121361. The reversal of 131000031121340 is 43121130000131.

It is a super-2 number, since 2×131000031121340² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87374336 + ... + 88860984.

It is an arithmetic number, because the mean of its divisors is an integer number (2988500996250).

Almost surely, 2^{131000031121340} is an apocalyptic number.

131000031121340 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 131000031121340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143448047820000).

131000031121340 is an abundant number, since it is smaller than the sum of its proper divisors (155896064518660).

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

131000031121340 is a wasteful number, since it uses less digits than its factorization.

131000031121340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487919 (or 1487917 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 131000031121340 its reverse (43121130000131), we get a palindrome (174121161121471).

The spelling of 131000031121340 in words is "one hundred thirty-one trillion, thirty-one million, one hundred twenty-one thousand, three hundred forty".