12220021109 has 2 divisors, whose sum is σ = 12220021110. Its totient is φ = 12220021108.

The previous prime is 12220021067. The next prime is 12220021111. The reversal of 12220021109 is 90112002221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7372798225 + 4847222884 = 85865^2 + 69622^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12220021109 is a prime.

It is a super-3 number, since 3×12220021109³ (a number of 31 digits) contains 333 as substring.

It is a Sophie Germain prime.

Together with 12220021111, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12220021139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110010554 + 6110010555.

It is an arithmetic number, because the mean of its divisors is an integer number (6110010555).

Almost surely, 2^12220021109 is an apocalyptic number.

It is an amenable number.

12220021109 is a deficient number, since it is larger than the sum of its proper divisors (1).

12220021109 is an equidigital number, since it uses as much as digits as its factorization.

12220021109 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 20.

The spelling of 12220021109 in words is "twelve billion, two hundred twenty million, twenty-one thousand, one hundred nine".