123111213203 has 24 divisors (see below), whose sum is σ = 143853321360. Its totient is φ = 104978808000.

The previous prime is 123111213193. The next prime is 123111213227. The reversal of 123111213203 is 302312111321.

It is a happy number.

It is not a de Polignac number, because 123111213203 - 2¹⁰ = 123111212179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123111213233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32900 + ... + 497297.

It is an arithmetic number, because the mean of its divisors is an integer number (5993888390).

Almost surely, 2^123111213203 is an apocalyptic number.

123111213203 is a deficient number, since it is larger than the sum of its proper divisors (20742108157).

123111213203 is a wasteful number, since it uses less digits than its factorization.

123111213203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530339 (or 530328 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 123111213203 its reverse (302312111321), we get a palindrome (425423324524).

The spelling of 123111213203 in words is "one hundred twenty-three billion, one hundred eleven million, two hundred thirteen thousand, two hundred three".