12022551809 has 2 divisors, whose sum is σ = 12022551810. Its totient is φ = 12022551808.

The previous prime is 12022551803. The next prime is 12022551817. The reversal of 12022551809 is 90815522021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11816342209 + 206209600 = 108703^2 + 14360^2 .

It is a cyclic number.

It is not a de Polignac number, because 12022551809 - 2⁸ = 12022551553 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12022551803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6011275904 + 6011275905.

It is an arithmetic number, because the mean of its divisors is an integer number (6011275905).

Almost surely, 2^12022551809 is an apocalyptic number.

It is an amenable number.

12022551809 is a deficient number, since it is larger than the sum of its proper divisors (1).

12022551809 is an equidigital number, since it uses as much as digits as its factorization.

12022551809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 35.

The spelling of 12022551809 in words is "twelve billion, twenty-two million, five hundred fifty-one thousand, eight hundred nine".