2101212306 has 32 divisors (see below), whose sum is σ = 4673786880. Its totient is φ = 699740208.

The previous prime is 2101212251. The next prime is 2101212317. The reversal of 2101212306 is 6032121012.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40800 + ... + 76596.

It is an arithmetic number, because the mean of its divisors is an integer number (146055840).

Almost surely, 2^2101212306 is an apocalyptic number.

2101212306 is an abundant number, since it is smaller than the sum of its proper divisors (2572574574).

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

2101212306 is a wasteful number, since it uses less digits than its factorization.

2101212306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36895 (or 36889 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2101212306 is about 45838.9823839928. The cubic root of 2101212306 is about 1280.8255388229.

Adding to 2101212306 its reverse (6032121012), we get a palindrome (8133333318).

The spelling of 2101212306 in words is "two billion, one hundred one million, two hundred twelve thousand, three hundred six".