12100012209 has 48 divisors (see below), whose sum is σ = 18525059280. Its totient is φ = 7600158720.

The previous prime is 12100012207. The next prime is 12100012217. The reversal of 12100012209 is 90221000121.

It can be written as a sum of positive squares in 8 ways, for example, as 980942400 + 11119069809 = 31320^2 + 105447^2 .

It is not a de Polignac number, because 12100012209 - 2¹ = 12100012207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12100012191 and 12100012200.

It is not an unprimeable number, because it can be changed into a prime (12100012207) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1867227 + ... + 1873695.

It is an arithmetic number, because the mean of its divisors is an integer number (385938735).

Almost surely, 2^12100012209 is an apocalyptic number.

It is an amenable number.

12100012209 is a deficient number, since it is larger than the sum of its proper divisors (6425047071).

12100012209 is a wasteful number, since it uses less digits than its factorization.

12100012209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6690 (or 6687 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The spelling of 12100012209 in words is "twelve billion, one hundred million, twelve thousand, two hundred nine".