100020201209 has 2 divisors, whose sum is σ = 100020201210. Its totient is φ = 100020201208.

The previous prime is 100020201181. The next prime is 100020201221. The reversal of 100020201209 is 902102020001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99585687184 + 434514025 = 315572^2 + 20845^2 .

It is a cyclic number.

It is not a de Polignac number, because 100020201209 - 2¹² = 100020197113 is a prime.

It is not a weakly prime, because it can be changed into another prime (100020203209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50010100604 + 50010100605.

It is an arithmetic number, because the mean of its divisors is an integer number (50010100605).

Almost surely, 2^100020201209 is an apocalyptic number.

It is an amenable number.

100020201209 is a deficient number, since it is larger than the sum of its proper divisors (1).

100020201209 is an equidigital number, since it uses as much as digits as its factorization.

100020201209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

The spelling of 100020201209 in words is "one hundred billion, twenty million, two hundred one thousand, two hundred nine".