123111211233 has 4 divisors (see below), whose sum is σ = 164148281648. Its totient is φ = 82074140820.

The previous prime is 123111211219. The next prime is 123111211261. The reversal of 123111211233 is 332112111321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 123111211233 - 2⁸ = 123111210977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123111211283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20518535203 + ... + 20518535208.

It is an arithmetic number, because the mean of its divisors is an integer number (41037070412).

Almost surely, 2^123111211233 is an apocalyptic number.

It is an amenable number.

123111211233 is a deficient number, since it is larger than the sum of its proper divisors (41037070415).

123111211233 is an equidigital number, since it uses as much as digits as its factorization.

123111211233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41037070414.

The product of its digits is 216, while the sum is 21.

Adding to 123111211233 its reverse (332112111321), we get a palindrome (455223322554).

The spelling of 123111211233 in words is "one hundred twenty-three billion, one hundred eleven million, two hundred eleven thousand, two hundred thirty-three".