2100210012 has 96 divisors (see below), whose sum is σ = 5584239360. Its totient is φ = 682344000.

The previous prime is 2100209989. The next prime is 2100210019. The reversal of 2100210012 is 2100120012.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 2100209976 and 2100210003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100210019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 931887 + ... + 934137.

It is an arithmetic number, because the mean of its divisors is an integer number (58169160).

Almost surely, 2^2100210012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2100210012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2792119680).

2100210012 is an abundant number, since it is smaller than the sum of its proper divisors (3484029348).

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

2100210012 is a wasteful number, since it uses less digits than its factorization.

2100210012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2480 (or 2472 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2100210012 is about 45828.0483110507. The cubic root of 2100210012 is about 1280.6218519759.

Adding to 2100210012 its reverse (2100120012), we get a palindrome (4200330024).

Subtracting from 2100210012 its reverse (2100120012), we obtain a square (90000 = 300²).

The spelling of 2100210012 in words is "two billion, one hundred million, two hundred ten thousand, twelve".