12431401121 has 4 divisors (see below), whose sum is σ = 12635194644. Its totient is φ = 12227607600.

The previous prime is 12431401091. The next prime is 12431401127. The reversal of 12431401121 is 12110413421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12110413421 = 16561 ⋅731261.

It can be written as a sum of positive squares in 2 ways, for example, as 5941326400 + 6490074721 = 77080^2 + 80561^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12431401121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12431401093 and 12431401102.

It is not an unprimeable number, because it can be changed into a prime (12431401127) 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, 101896670 + ... + 101896791.

It is an arithmetic number, because the mean of its divisors is an integer number (3158798661).

Almost surely, 2^12431401121 is an apocalyptic number.

It is an amenable number.

12431401121 is a deficient number, since it is larger than the sum of its proper divisors (203793523).

12431401121 is an equidigital number, since it uses as much as digits as its factorization.

12431401121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203793522.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 12431401121 its reverse (12110413421), we get a palindrome (24541814542).

The spelling of 12431401121 in words is "twelve billion, four hundred thirty-one million, four hundred one thousand, one hundred twenty-one".