12131201240 has 16 divisors (see below), whose sum is σ = 27295202880. Its totient is φ = 4852480480.

The previous prime is 12131201183. The next prime is 12131201249. The reversal of 12131201240 is 4210213121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131201249) 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, 151639976 + ... + 151640055.

It is an arithmetic number, because the mean of its divisors is an integer number (1705950180).

Almost surely, 2^12131201240 is an apocalyptic number.

12131201240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12131201240 is an abundant number, since it is smaller than the sum of its proper divisors (15164001640).

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

12131201240 is a wasteful number, since it uses less digits than its factorization.

12131201240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303280042 (or 303280038 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12131201240 its reverse (4210213121), we get a palindrome (16341414361).

The spelling of 12131201240 in words is "twelve billion, one hundred thirty-one million, two hundred one thousand, two hundred forty".