202020101102209 has 4 divisors (see below), whose sum is σ = 217560108879316. Its totient is φ = 186480093325104.

The previous prime is 202020101102173. The next prime is 202020101102231. The reversal of 202020101102209 is 902201101020202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56051949636225 + 145968151465984 = 7486785^2 + 12081728^2 .

It is a cyclic number.

It is not a de Polignac number, because 202020101102209 - 2⁷ = 202020101102081 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 202020101102209.

It is not an unprimeable number, because it can be changed into a prime (202020101102509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7770003888534 + ... + 7770003888559.

It is an arithmetic number, because the mean of its divisors is an integer number (54390027219829).

Almost surely, 2^{202020101102209} is an apocalyptic number.

It is an amenable number.

202020101102209 is a deficient number, since it is larger than the sum of its proper divisors (15540007777107).

202020101102209 is a wasteful number, since it uses less digits than its factorization.

202020101102209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15540007777106.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 202020101102209 in words is "two hundred two trillion, twenty billion, one hundred one million, one hundred two thousand, two hundred nine".