12442421111 has 4 divisors (see below), whose sum is σ = 13097285400. Its totient is φ = 11787556824.

The previous prime is 12442421107. The next prime is 12442421141. The reversal of 12442421111 is 11112424421.

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

It is a cyclic number.

It is not a de Polignac number, because 12442421111 - 2² = 12442421107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12442421141) 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, 327432116 + ... + 327432153.

It is an arithmetic number, because the mean of its divisors is an integer number (3274321350).

Almost surely, 2^12442421111 is an apocalyptic number.

12442421111 is a deficient number, since it is larger than the sum of its proper divisors (654864289).

12442421111 is an equidigital number, since it uses as much as digits as its factorization.

12442421111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654864288.

The product of its digits is 512, while the sum is 23.

Adding to 12442421111 its reverse (11112424421), we get a palindrome (23554845532).

The spelling of 12442421111 in words is "twelve billion, four hundred forty-two million, four hundred twenty-one thousand, one hundred eleven".