12201421231 has 4 divisors (see below), whose sum is σ = 12207116992. Its totient is φ = 12195725472.

The previous prime is 12201421187. The next prime is 12201421247. The reversal of 12201421231 is 13212410221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12201421231 - 2²¹ = 12199324079 is a prime.

It is a super-2 number, since 2×12201421231² (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 = 12201421199 and 12201421208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12201421031) 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, 2844666 + ... + 2848951.

It is an arithmetic number, because the mean of its divisors is an integer number (3051779248).

Almost surely, 2^12201421231 is an apocalyptic number.

12201421231 is a deficient number, since it is larger than the sum of its proper divisors (5695761).

12201421231 is an equidigital number, since it uses as much as digits as its factorization.

12201421231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5695760.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 12201421231 its reverse (13212410221), we get a palindrome (25413831452).

The spelling of 12201421231 in words is "twelve billion, two hundred one million, four hundred twenty-one thousand, two hundred thirty-one".