12311121103 has 2 divisors, whose sum is σ = 12311121104. Its totient is φ = 12311121102.

The previous prime is 12311121101. The next prime is 12311121107. The reversal of 12311121103 is 30112111321.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12311121103 - 2¹ = 12311121101 is a prime.

Together with 12311121101, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12311121101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6155560551 + 6155560552.

It is an arithmetic number, because the mean of its divisors is an integer number (6155560552).

Almost surely, 2^12311121103 is an apocalyptic number.

12311121103 is a deficient number, since it is larger than the sum of its proper divisors (1).

12311121103 is an equidigital number, since it uses as much as digits as its factorization.

12311121103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 12311121103 its reverse (30112111321), we get a palindrome (42423232424).

The spelling of 12311121103 in words is "twelve billion, three hundred eleven million, one hundred twenty-one thousand, one hundred three".