12112402021 has 4 divisors (see below), whose sum is σ = 12112644544. Its totient is φ = 12112159500.

The previous prime is 12112402013. The next prime is 12112402031. The reversal of 12112402021 is 12020421121.

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 12112402021 - 2³ = 12112402013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12112401986 and 12112402004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112402031) 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, 15735 + ... + 156436.

It is an arithmetic number, because the mean of its divisors is an integer number (3028161136).

Almost surely, 2^12112402021 is an apocalyptic number.

It is an amenable number.

12112402021 is a deficient number, since it is larger than the sum of its proper divisors (242523).

12112402021 is an equidigital number, since it uses as much as digits as its factorization.

12112402021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242522.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12112402021 its reverse (12020421121), we get a palindrome (24132823142).

The spelling of 12112402021 in words is "twelve billion, one hundred twelve million, four hundred two thousand, twenty-one".