12030212309 has 4 divisors (see below), whose sum is σ = 12030443916. Its totient is φ = 12029980704.

The previous prime is 12030212263. The next prime is 12030212329. The reversal of 12030212309 is 90321203021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6939389809 + 5090822500 = 83303^2 + 71350^2 .

It is a cyclic number.

It is not a de Polignac number, because 12030212309 - 2¹⁶ = 12030146773 is a prime.

It is a super-3 number, since 3×12030212309³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12030212329) 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, 2177 + ... + 155129.

It is an arithmetic number, because the mean of its divisors is an integer number (3007610979).

Almost surely, 2^12030212309 is an apocalyptic number.

It is an amenable number.

12030212309 is a deficient number, since it is larger than the sum of its proper divisors (231607).

12030212309 is an equidigital number, since it uses as much as digits as its factorization.

12030212309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231606.

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

The spelling of 12030212309 in words is "twelve billion, thirty million, two hundred twelve thousand, three hundred nine".