12012302213 has 4 divisors (see below), whose sum is σ = 12012525408. Its totient is φ = 12012079020.

The previous prime is 12012302191. The next prime is 12012302243. The reversal of 12012302213 is 31220321021.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31220321021 = 68491 ⋅455831.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12012302213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12012302191 and 12012302200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012302243) 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, 24278 + ... + 156888.

It is an arithmetic number, because the mean of its divisors is an integer number (3003131352).

Almost surely, 2^12012302213 is an apocalyptic number.

It is an amenable number.

12012302213 is a deficient number, since it is larger than the sum of its proper divisors (223195).

12012302213 is an equidigital number, since it uses as much as digits as its factorization.

12012302213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223194.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 12012302213 its reverse (31220321021), we get a palindrome (43232623234).

The spelling of 12012302213 in words is "twelve billion, twelve million, three hundred two thousand, two hundred thirteen".