12120230309 has 4 divisors (see below), whose sum is σ = 13222069440. Its totient is φ = 11018391180.

The previous prime is 12120230281. The next prime is 12120230329. The reversal of 12120230309 is 90303202121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12120230309 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120230329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550919549 + ... + 550919570.

It is an arithmetic number, because the mean of its divisors is an integer number (3305517360).

Almost surely, 2^12120230309 is an apocalyptic number.

It is an amenable number.

12120230309 is a deficient number, since it is larger than the sum of its proper divisors (1101839131).

12120230309 is a wasteful number, since it uses less digits than its factorization.

12120230309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101839130.

The product of its (nonzero) digits is 648, while the sum is 23.

The spelling of 12120230309 in words is "twelve billion, one hundred twenty million, two hundred thirty thousand, three hundred nine".