123020102100 has 144 divisors (see below), whose sum is σ = 406910983808. Its totient is φ = 28110274560.

The previous prime is 123020102099. The next prime is 123020102131. The reversal of 123020102100 is 1201020321.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 9016884 + ... + 9030516.

Almost surely, 2^123020102100 is an apocalyptic number.

123020102100 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 123020102100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203455491904).

123020102100 is an abundant number, since it is smaller than the sum of its proper divisors (283890881708).

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

123020102100 is a wasteful number, since it uses less digits than its factorization.

123020102100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17954 (or 17947 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 123020102100 its reverse (1201020321), we get a palindrome (124221122421).

The spelling of 123020102100 in words is "one hundred twenty-three billion, twenty million, one hundred two thousand, one hundred".