12112421043 has 4 divisors (see below), whose sum is σ = 16149894728. Its totient is φ = 8074947360.

The previous prime is 12112421011. The next prime is 12112421077. The reversal of 12112421043 is 34012421121.

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

It is not a de Polignac number, because 12112421043 - 2⁵ = 12112421011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12112421003) 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, 2018736838 + ... + 2018736843.

It is an arithmetic number, because the mean of its divisors is an integer number (4037473682).

Almost surely, 2^12112421043 is an apocalyptic number.

12112421043 is a deficient number, since it is larger than the sum of its proper divisors (4037473685).

12112421043 is an equidigital number, since it uses as much as digits as its factorization.

12112421043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4037473684.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 12112421043 its reverse (34012421121), we get a palindrome (46124842164).

The spelling of 12112421043 in words is "twelve billion, one hundred twelve million, four hundred twenty-one thousand, forty-three".