2101212012 has 48 divisors (see below), whose sum is σ = 5148686592. Its totient is φ = 665670720.

The previous prime is 2101212011. The next prime is 2101212041. The reversal of 2101212012 is 2102121012.

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

It is not an unprimeable number, because it can be changed into a prime (2101212011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19087 + ... + 67577.

It is an arithmetic number, because the mean of its divisors is an integer number (107264304).

Almost surely, 2^2101212012 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 2101212012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2574343296).

2101212012 is an abundant number, since it is smaller than the sum of its proper divisors (3047474580).

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

2101212012 is a wasteful number, since it uses less digits than its factorization.

2101212012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48678 (or 48676 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2101212012 is about 45838.9791771152. The cubic root of 2101212012 is about 1280.8254790855.

Adding to 2101212012 its reverse (2102121012), we get a palindrome (4203333024).

The spelling of 2101212012 in words is "two billion, one hundred one million, two hundred twelve thousand, twelve".