2123030100 has 72 divisors (see below), whose sum is σ = 6203540448. Its totient is φ = 560528000.

The previous prime is 2123030093. The next prime is 2123030149. The reversal of 2123030100 is 10303212.

It is a happy number.

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 polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4734 + ... + 65333.

It is an arithmetic number, because the mean of its divisors is an integer number (86160284).

Almost surely, 2^2123030100 is an apocalyptic number.

2123030100 is a gapful number since it is divisible by the number (20) 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 2123030100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3101770224).

2123030100 is an abundant number, since it is smaller than the sum of its proper divisors (4080510348).

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

2123030100 is a wasteful number, since it uses less digits than its factorization.

2123030100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70185 (or 70178 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 2123030100 is about 46076.3507669607. The cubic root of 2123030100 is about 1285.2434044610.

Adding to 2123030100 its reverse (10303212), we get a palindrome (2133333312).

The spelling of 2123030100 in words is "two billion, one hundred twenty-three million, thirty thousand, one hundred".