13131121050 has 72 divisors (see below), whose sum is σ = 36417014400. Its totient is φ = 3388672800.

The previous prime is 13131121039. The next prime is 13131121051. The reversal of 13131121050 is 5012113131.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13131121051) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 456700 + ... + 484599.

Almost surely, 2^13131121050 is an apocalyptic number.

13131121050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13131121050 is an abundant number, since it is smaller than the sum of its proper divisors (23285893350).

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

13131121050 is a wasteful number, since it uses less digits than its factorization.

13131121050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941348 (or 941340 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

Adding to 13131121050 its reverse (5012113131), we get a palindrome (18143234181).

The spelling of 13131121050 in words is "thirteen billion, one hundred thirty-one million, one hundred twenty-one thousand, fifty".