10221212012209 has 16 divisors (see below), whose sum is σ = 11156242161600. Its totient is φ = 9287154360000.

The previous prime is 10221212012177. The next prime is 10221212012239. The reversal of 10221212012209 is 90221021212201.

It is a happy number.

It is not a de Polignac number, because 10221212012209 - 2⁵ = 10221212012177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10221212012239) 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, 276971659 + ... + 277008559.

It is an arithmetic number, because the mean of its divisors is an integer number (697265135100).

Almost surely, 2^{10221212012209} is an apocalyptic number.

It is an amenable number.

10221212012209 is a deficient number, since it is larger than the sum of its proper divisors (935030149391).

10221212012209 is a wasteful number, since it uses less digits than its factorization.

10221212012209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49392.

The product of its (nonzero) digits is 576, while the sum is 25.

The spelling of 10221212012209 in words is "ten trillion, two hundred twenty-one billion, two hundred twelve million, twelve thousand, two hundred nine".