12421214231 has 4 divisors (see below), whose sum is σ = 12449901072. Its totient is φ = 12392527392.

The previous prime is 12421214213. The next prime is 12421214293. The reversal of 12421214231 is 13241212421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13241212421 = 32143 ⋅411947.

It is a cyclic number.

It is not a de Polignac number, because 12421214231 - 2¹⁴ = 12421197847 is a prime.

It is a super-2 number, since 2×12421214231² (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 = 12421214197 and 12421214206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12421204231) 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, 14342771 + ... + 14343636.

It is an arithmetic number, because the mean of its divisors is an integer number (3112475268).

Almost surely, 2^12421214231 is an apocalyptic number.

12421214231 is a deficient number, since it is larger than the sum of its proper divisors (28686841).

12421214231 is an equidigital number, since it uses as much as digits as its factorization.

12421214231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28686840.

The product of its digits is 768, while the sum is 23.

Adding to 12421214231 its reverse (13241212421), we get a palindrome (25662426652).

The spelling of 12421214231 in words is "twelve billion, four hundred twenty-one million, two hundred fourteen thousand, two hundred thirty-one".