12405311231 has 8 divisors (see below), whose sum is σ = 12473144640. Its totient is φ = 12337527328.

The previous prime is 12405311227. The next prime is 12405311249. The reversal of 12405311231 is 13211350421.

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 12405311231 - 2² = 12405311227 is a prime.

It is a super-2 number, since 2×12405311231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12405311197 and 12405311206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12405311221) 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, 562250 + ... + 583896.

It is an arithmetic number, because the mean of its divisors is an integer number (1559143080).

Almost surely, 2^12405311231 is an apocalyptic number.

12405311231 is a deficient number, since it is larger than the sum of its proper divisors (67833409).

12405311231 is a wasteful number, since it uses less digits than its factorization.

12405311231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24753.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 12405311231 its reverse (13211350421), we get a palindrome (25616661652).

The spelling of 12405311231 in words is "twelve billion, four hundred five million, three hundred eleven thousand, two hundred thirty-one".