12131403121 has 8 divisors (see below), whose sum is σ = 12631019688. Its totient is φ = 11641488000.

The previous prime is 12131403113. The next prime is 12131403209. The reversal of 12131403121 is 12130413121.

It can be written as a sum of positive squares in 4 ways, for example, as 1068570721 + 11062832400 = 32689^2 + 105180^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12131403121 - 2³ = 12131403113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12131403721) 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, 2422810 + ... + 2427811.

It is an arithmetic number, because the mean of its divisors is an integer number (1578877461).

Almost surely, 2^12131403121 is an apocalyptic number.

It is an amenable number.

12131403121 is a deficient number, since it is larger than the sum of its proper divisors (499616567).

12131403121 is an equidigital number, since it uses as much as digits as its factorization.

12131403121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4850723.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 12131403121 its reverse (12130413121), we get a palindrome (24261816242).

The spelling of 12131403121 in words is "twelve billion, one hundred thirty-one million, four hundred three thousand, one hundred twenty-one".