2105212012 has 12 divisors (see below), whose sum is σ = 3685847256. Its totient is φ = 1052112800.

The previous prime is 2105212003. The next prime is 2105212037. The reversal of 2105212012 is 2102125012.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113614 + ... + 130837.

It is an arithmetic number, because the mean of its divisors is an integer number (307153938).

Almost surely, 2^2105212012 is an apocalyptic number.

It is an amenable number.

2105212012 is a deficient number, since it is larger than the sum of its proper divisors (1580635244).

2105212012 is a wasteful number, since it uses less digits than its factorization.

2105212012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246608 (or 246606 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 2105212012 is about 45882.5894212609. The cubic root of 2105212012 is about 1281.6377173409.

Adding to 2105212012 its reverse (2102125012), we get a palindrome (4207337024).

The spelling of 2105212012 in words is "two billion, one hundred five million, two hundred twelve thousand, twelve".