12431013221 has 8 divisors (see below), whose sum is σ = 13849640064. Its totient is φ = 11060475520.

The previous prime is 12431013193. The next prime is 12431013223. The reversal of 12431013221 is 12231013421.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12431013221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12431013193 and 12431013202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12431013223) 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, 12021740 + ... + 12022773.

It is an arithmetic number, because the mean of its divisors is an integer number (1731205008).

Almost surely, 2^12431013221 is an apocalyptic number.

12431013221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12431013221 is a deficient number, since it is larger than the sum of its proper divisors (1418626843).

12431013221 is a wasteful number, since it uses less digits than its factorization.

12431013221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24044571.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 12431013221 its reverse (12231013421), we get a palindrome (24662026642).

The spelling of 12431013221 in words is "twelve billion, four hundred thirty-one million, thirteen thousand, two hundred twenty-one".