12321424455 has 32 divisors (see below), whose sum is σ = 20361922560. Its totient is φ = 6355789440.

The previous prime is 12321424447. The next prime is 12321424459. The reversal of 12321424455 is 55442412321.

It is not a de Polignac number, because 12321424455 - 2³ = 12321424447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12321424459) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 924781 + ... + 938009.

It is an arithmetic number, because the mean of its divisors is an integer number (636310080).

Almost surely, 2^12321424455 is an apocalyptic number.

12321424455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12321424455 is a deficient number, since it is larger than the sum of its proper divisors (8040498105).

12321424455 is a wasteful number, since it uses less digits than its factorization.

12321424455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15271.

The product of its digits is 38400, while the sum is 33.

Adding to 12321424455 its reverse (55442412321), we get a palindrome (67763836776).

The spelling of 12321424455 in words is "twelve billion, three hundred twenty-one million, four hundred twenty-four thousand, four hundred fifty-five".