12232223421 has 16 divisors (see below), whose sum is σ = 18273200448. Its totient is φ = 7213104000.

The previous prime is 12232223417. The next prime is 12232223447. The reversal of 12232223421 is 12432223221.

It is not a de Polignac number, because 12232223421 - 2² = 12232223417 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12232223391 and 12232223400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12232223411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5007880 + ... + 5010321.

It is an arithmetic number, because the mean of its divisors is an integer number (1142075028).

Almost surely, 2^12232223421 is an apocalyptic number.

12232223421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12232223421 is a deficient number, since it is larger than the sum of its proper divisors (6040977027).

12232223421 is a wasteful number, since it uses less digits than its factorization.

12232223421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10018252.

The product of its digits is 2304, while the sum is 24.

Adding to 12232223421 its reverse (12432223221), we get a palindrome (24664446642).

The spelling of 12232223421 in words is "twelve billion, two hundred thirty-two million, two hundred twenty-three thousand, four hundred twenty-one".