12021122209 has 2 divisors, whose sum is σ = 12021122210. Its totient is φ = 12021122208.

The previous prime is 12021122171. The next prime is 12021122233. The reversal of 12021122209 is 90222112021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11958078609 + 63043600 = 109353^2 + 7940^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021122209 - 2⁷ = 12021122081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12021122209.

It is not a weakly prime, because it can be changed into another prime (12021122279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010561104 + 6010561105.

It is an arithmetic number, because the mean of its divisors is an integer number (6010561105).

Almost surely, 2^12021122209 is an apocalyptic number.

It is an amenable number.

12021122209 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021122209 is an equidigital number, since it uses as much as digits as its factorization.

12021122209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 12021122209 in words is "twelve billion, twenty-one million, one hundred twenty-two thousand, two hundred nine".