123111012200 has 96 divisors (see below), whose sum is σ = 315763272000. Its totient is φ = 44264563200.

The previous prime is 123111012191. The next prime is 123111012203. The reversal of 123111012200 is 2210111321.

It is not an unprimeable number, because it can be changed into a prime (123111012203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 118580 + ... + 510179.

It is an arithmetic number, because the mean of its divisors is an integer number (3289200750).

Almost surely, 2^123111012200 is an apocalyptic number.

123111012200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123111012200 is an abundant number, since it is smaller than the sum of its proper divisors (192652259800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123111012200 is a wasteful number, since it uses less digits than its factorization.

123111012200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628875 (or 628866 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 123111012200 its reverse (2210111321), we get a palindrome (125321123521).

The spelling of 123111012200 in words is "one hundred twenty-three billion, one hundred eleven million, twelve thousand, two hundred".