13131121140 has 48 divisors (see below), whose sum is σ = 40852378560. Its totient is φ = 3501632160.

The previous prime is 13131121123. The next prime is 13131121169. The reversal of 13131121140 is 4112113131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12157906 + ... + 12158985.

It is an arithmetic number, because the mean of its divisors is an integer number (851091220).

Almost surely, 2^13131121140 is an apocalyptic number.

13131121140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13131121140 is an abundant number, since it is smaller than the sum of its proper divisors (27721257420).

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

13131121140 is a wasteful number, since it uses less digits than its factorization.

13131121140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24316909 (or 24316901 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 13131121140 its reverse (4112113131), we get a palindrome (17243234271).

The spelling of 13131121140 in words is "thirteen billion, one hundred thirty-one million, one hundred twenty-one thousand, one hundred forty".