20020122209 has 4 divisors (see below), whose sum is σ = 20446082304. Its totient is φ = 19594162116.

The previous prime is 20020122173. The next prime is 20020122211. The reversal of 20020122209 is 90222102002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20020122209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20020122289) 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, 212979977 + ... + 212980070.

It is an arithmetic number, because the mean of its divisors is an integer number (5111520576).

Almost surely, 2^20020122209 is an apocalyptic number.

It is an amenable number.

20020122209 is a deficient number, since it is larger than the sum of its proper divisors (425960095).

20020122209 is an equidigital number, since it uses as much as digits as its factorization.

20020122209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425960094.

The product of its (nonzero) digits is 288, while the sum is 20.

The spelling of 20020122209 in words is "twenty billion, twenty million, one hundred twenty-two thousand, two hundred nine".