12120430021 has 8 divisors (see below), whose sum is σ = 13857413184. Its totient is φ = 10384820160.

The previous prime is 12120430019. The next prime is 12120430031. The reversal of 12120430021 is 12003402121.

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

It is a cyclic number.

It is not a de Polignac number, because 12120430021 - 2¹ = 12120430019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12120429977 and 12120430004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120430001) 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, 324340 + ... + 359773.

It is an arithmetic number, because the mean of its divisors is an integer number (1732176648).

Almost surely, 2^12120430021 is an apocalyptic number.

It is an amenable number.

12120430021 is a deficient number, since it is larger than the sum of its proper divisors (1736983163).

12120430021 is an equidigital number, since it uses as much as digits as its factorization.

12120430021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686651.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 12120430021 its reverse (12003402121), we get a palindrome (24123832142).

The spelling of 12120430021 in words is "twelve billion, one hundred twenty million, four hundred thirty thousand, twenty-one".