12103243111 has 4 divisors (see below), whose sum is σ = 12256448800. Its totient is φ = 11950037424.

The previous prime is 12103243099. The next prime is 12103243127. The reversal of 12103243111 is 11134230121.

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 12103243111 - 2²³ = 12094854503 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 (12103243151) 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, 76602726 + ... + 76602883.

It is an arithmetic number, because the mean of its divisors is an integer number (3064112200).

Almost surely, 2^12103243111 is an apocalyptic number.

12103243111 is a deficient number, since it is larger than the sum of its proper divisors (153205689).

12103243111 is an equidigital number, since it uses as much as digits as its factorization.

12103243111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153205688.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 12103243111 its reverse (11134230121), we get a palindrome (23237473232).

The spelling of 12103243111 in words is "twelve billion, one hundred three million, two hundred forty-three thousand, one hundred eleven".