131122131320 has 16 divisors (see below), whose sum is σ = 295024795560. Its totient is φ = 52448852512.

The previous prime is 131122131317. The next prime is 131122131323. The reversal of 131122131320 is 23131221131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (131122131317) and next prime (131122131323).

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

It is a junction number, because it is equal to n+sod(n) for n = 131122131292 and 131122131301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131122131323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1639026602 + ... + 1639026681.

Almost surely, 2^131122131320 is an apocalyptic number.

131122131320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131122131320 is an abundant number, since it is smaller than the sum of its proper divisors (163902664240).

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

131122131320 is a wasteful number, since it uses less digits than its factorization.

131122131320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3278053294 (or 3278053290 counting only the distinct ones).

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

Adding to 131122131320 its reverse (23131221131), we get a palindrome (154253352451).

The spelling of 131122131320 in words is "one hundred thirty-one billion, one hundred twenty-two million, one hundred thirty-one thousand, three hundred twenty".