123110312100 has 36 divisors (see below), whose sum is σ = 356199170544. Its totient is φ = 32829416480.

The previous prime is 123110312029. The next prime is 123110312119. The reversal of 123110312100 is 1213011321.

It is a happy number.

It is a super-2 number, since 2×123110312100² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 123110312100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 205183554 + ... + 205184153.

It is an arithmetic number, because the mean of its divisors is an integer number (9894421404).

Almost surely, 2^123110312100 is an apocalyptic number.

123110312100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123110312100 is an abundant number, since it is smaller than the sum of its proper divisors (233088858444).

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

123110312100 is a wasteful number, since it uses less digits than its factorization.

123110312100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410367724 (or 410367717 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 123110312100 its reverse (1213011321), we get a palindrome (124323323421).

The spelling of 123110312100 in words is "one hundred twenty-three billion, one hundred ten million, three hundred twelve thousand, one hundred".