131123555412 has 24 divisors (see below), whose sum is σ = 314224016736. Its totient is φ = 42526558368.

The previous prime is 131123555399. The next prime is 131123555413. The reversal of 131123555412 is 214555321131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131123555413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147661218 + ... + 147662105.

It is an arithmetic number, because the mean of its divisors is an integer number (13092667364).

Almost surely, 2^131123555412 is an apocalyptic number.

131123555412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

131123555412 is an abundant number, since it is smaller than the sum of its proper divisors (183100461324).

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

131123555412 is a wasteful number, since it uses less digits than its factorization.

131123555412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295323367 (or 295323365 counting only the distinct ones).

The product of its digits is 18000, while the sum is 33.

Adding to 131123555412 its reverse (214555321131), we get a palindrome (345678876543).

The spelling of 131123555412 in words is "one hundred thirty-one billion, one hundred twenty-three million, five hundred fifty-five thousand, four hundred twelve".