202010200109 has 2 divisors, whose sum is σ = 202010200110. Its totient is φ = 202010200108.

The previous prime is 202010200097. The next prime is 202010200169. The reversal of 202010200109 is 901002010202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179990608009 + 22019592100 = 424253^2 + 148390^2 .

It is a cyclic number.

It is not a de Polignac number, because 202010200109 - 2¹² = 202010196013 is a prime.

It is a super-2 number, since 2×202010200109² (a number of 23 digits) contains 22 as substring.

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 (202010200169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101005100054 + 101005100055.

It is an arithmetic number, because the mean of its divisors is an integer number (101005100055).

Almost surely, 2^202010200109 is an apocalyptic number.

It is an amenable number.

202010200109 is a deficient number, since it is larger than the sum of its proper divisors (1).

202010200109 is an equidigital number, since it uses as much as digits as its factorization.

202010200109 is an evil number, because the sum of its binary digits is even.

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

The spelling of 202010200109 in words is "two hundred two billion, ten million, two hundred thousand, one hundred nine".