12103311231211 has 4 divisors (see below), whose sum is σ = 12108964344624. Its totient is φ = 12097658117800.

The previous prime is 12103311231149. The next prime is 12103311231283. The reversal of 12103311231211 is 11213211330121.

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 12103311231211 - 2³⁹ = 11553555417323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12103311231511) 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, 2826553495 + ... + 2826557776.

It is an arithmetic number, because the mean of its divisors is an integer number (3027241086156).

Almost surely, 2^{12103311231211} is an apocalyptic number.

12103311231211 is a deficient number, since it is larger than the sum of its proper divisors (5653113413).

12103311231211 is an equidigital number, since it uses as much as digits as its factorization.

12103311231211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5653113412.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 12103311231211 its reverse (11213211330121), we get a palindrome (23316522561332).

The spelling of 12103311231211 in words is "twelve trillion, one hundred three billion, three hundred eleven million, two hundred thirty-one thousand, two hundred eleven".