12112203021 has 4 divisors (see below), whose sum is σ = 16149604032. Its totient is φ = 8074802012.

The previous prime is 12112203007. The next prime is 12112203023. The reversal of 12112203021 is 12030221121.

12112203021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 12112203021 - 2²⁶ = 12045094157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112203023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2018700501 + ... + 2018700506.

It is an arithmetic number, because the mean of its divisors is an integer number (4037401008).

Almost surely, 2^12112203021 is an apocalyptic number.

It is an amenable number.

12112203021 is a deficient number, since it is larger than the sum of its proper divisors (4037401011).

12112203021 is an equidigital number, since it uses as much as digits as its factorization.

12112203021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4037401010.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12112203021 its reverse (12030221121), we get a palindrome (24142424142).

The spelling of 12112203021 in words is "twelve billion, one hundred twelve million, two hundred three thousand, twenty-one".