12021022009 has 2 divisors, whose sum is σ = 12021022010. Its totient is φ = 12021022008.

The previous prime is 12021022003. The next prime is 12021022043. The reversal of 12021022009 is 90022012021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9052951609 + 2968070400 = 95147^2 + 54480^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021022009 - 2³ = 12021022001 is a prime.

It is not a weakly prime, because it can be changed into another prime (12021022001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010511004 + 6010511005.

It is an arithmetic number, because the mean of its divisors is an integer number (6010511005).

Almost surely, 2^12021022009 is an apocalyptic number.

It is an amenable number.

12021022009 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021022009 is an equidigital number, since it uses as much as digits as its factorization.

12021022009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The spelling of 12021022009 in words is "twelve billion, twenty-one million, twenty-two thousand, nine".