20203122209 has 2 divisors, whose sum is σ = 20203122210. Its totient is φ = 20203122208.

The previous prime is 20203122109. The next prime is 20203122211. The reversal of 20203122209 is 90222130202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20193262609 + 9859600 = 142103^2 + 3140^2 .

It is a cyclic number.

It is not a de Polignac number, because 20203122209 - 2²⁴ = 20186344993 is a prime.

It is a super-2 number, since 2×20203122209² (a number of 21 digits) contains 22 as substring.

Together with 20203122211, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20203122229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101561104 + 10101561105.

It is an arithmetic number, because the mean of its divisors is an integer number (10101561105).

Almost surely, 2^20203122209 is an apocalyptic number.

It is an amenable number.

20203122209 is a deficient number, since it is larger than the sum of its proper divisors (1).

20203122209 is an equidigital number, since it uses as much as digits as its factorization.

20203122209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The spelling of 20203122209 in words is "twenty billion, two hundred three million, one hundred twenty-two thousand, two hundred nine".