204402220109 has 2 divisors, whose sum is σ = 204402220110. Its totient is φ = 204402220108.

The previous prime is 204402220103. The next prime is 204402220171. The reversal of 204402220109 is 901022204402.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 195256166884 + 9146053225 = 441878^2 + 95635^2 .

It is a cyclic number.

It is not a de Polignac number, because 204402220109 - 2³⁶ = 135682743373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204402220103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102201110054 + 102201110055.

It is an arithmetic number, because the mean of its divisors is an integer number (102201110055).

Almost surely, 2^204402220109 is an apocalyptic number.

It is an amenable number.

204402220109 is a deficient number, since it is larger than the sum of its proper divisors (1).

204402220109 is an equidigital number, since it uses as much as digits as its factorization.

204402220109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 26.

The spelling of 204402220109 in words is "two hundred four billion, four hundred two million, two hundred twenty thousand, one hundred nine".