2101200012 has 72 divisors (see below), whose sum is σ = 5363213856. Its totient is φ = 693598464.

The previous prime is 2101200011. The next prime is 2101200019. The reversal of 2101200012 is 2100021012.

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 = 2101199967 and 2101200003.

It is not an unprimeable number, because it can be changed into a prime (2101200011) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 2242008 + ... + 2242944.

Almost surely, 2^2101200012 is an apocalyptic number.

It is an amenable number.

2101200012 is an abundant number, since it is smaller than the sum of its proper divisors (3262013844).

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

2101200012 is a wasteful number, since it uses less digits than its factorization.

2101200012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487 (or 1482 counting only the distinct ones).

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

The square root of 2101200012 is about 45838.8482839611. The cubic root of 2101200012 is about 1280.8230408205.

Adding to 2101200012 its reverse (2100021012), we get a palindrome (4201221024).

The spelling of 2101200012 in words is "two billion, one hundred one million, two hundred thousand, twelve".