2100012220109 has 2 divisors, whose sum is σ = 2100012220110. Its totient is φ = 2100012220108.

The previous prime is 2100012220093. The next prime is 2100012220153. The reversal of 2100012220109 is 9010222100012.

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., 1901227322500 + 198784897609 = 1378850^2 + 445853^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100012220109 - 2⁴ = 2100012220093 is a prime.

It is a Sophie Germain 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 (2100012220169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050006110054 + 1050006110055.

It is an arithmetic number, because the mean of its divisors is an integer number (1050006110055).

Almost surely, 2^{2100012220109} is an apocalyptic number.

It is an amenable number.

2100012220109 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100012220109 is an equidigital number, since it uses as much as digits as its factorization.

2100012220109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 2100012220109 in words is "two trillion, one hundred billion, twelve million, two hundred twenty thousand, one hundred nine".