12120430421 has 8 divisors (see below), whose sum is σ = 13223361024. Its totient is φ = 11017678720.

The previous prime is 12120430411. The next prime is 12120430463. The reversal of 12120430421 is 12403402121.

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-12120430421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12120430393 and 12120430402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120430411) 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 7 ways as a sum of consecutive naturals, for example, 124940 + ... + 199626.

It is an arithmetic number, because the mean of its divisors is an integer number (1652920128).

Almost surely, 2^12120430421 is an apocalyptic number.

12120430421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12120430421 is a deficient number, since it is larger than the sum of its proper divisors (1102930603).

12120430421 is a wasteful number, since it uses less digits than its factorization.

12120430421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89451.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 12120430421 its reverse (12403402121), we get a palindrome (24523832542).

The spelling of 12120430421 in words is "twelve billion, one hundred twenty million, four hundred thirty thousand, four hundred twenty-one".