123213101100 has 144 divisors (see below), whose sum is σ = 364895311872. Its totient is φ = 32091517440.

The previous prime is 123213101093. The next prime is 123213101191. The reversal of 123213101100 is 1101312321.

It is a happy number.

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 123213101100.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2228389 + ... + 2283011.

Almost surely, 2^123213101100 is an apocalyptic number.

123213101100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123213101100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182447655936).

123213101100 is an abundant number, since it is smaller than the sum of its proper divisors (241682210772).

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

123213101100 is a wasteful number, since it uses less digits than its factorization.

123213101100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54816 (or 54809 counting only the distinct ones).

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

Adding to 123213101100 its reverse (1101312321), we get a palindrome (124314413421).

The spelling of 123213101100 in words is "one hundred twenty-three billion, two hundred thirteen million, one hundred one thousand, one hundred".