202020112009 has 2 divisors, whose sum is σ = 202020112010. Its totient is φ = 202020112008.

The previous prime is 202020111991. The next prime is 202020112067. The reversal of 202020112009 is 900211020202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174719820025 + 27300291984 = 417995^2 + 165228^2 .

It is a cyclic number.

It is not a de Polignac number, because 202020112009 - 2¹¹ = 202020109961 is a prime.

It is a super-2 number, since 2×202020112009² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (202020112109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101010056004 + 101010056005.

It is an arithmetic number, because the mean of its divisors is an integer number (101010056005).

Almost surely, 2^202020112009 is an apocalyptic number.

It is an amenable number.

202020112009 is a deficient number, since it is larger than the sum of its proper divisors (1).

202020112009 is an equidigital number, since it uses as much as digits as its factorization.

202020112009 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 19.

The spelling of 202020112009 in words is "two hundred two billion, twenty million, one hundred twelve thousand, nine".