20233221209 has 2 divisors, whose sum is σ = 20233221210. Its totient is φ = 20233221208.

The previous prime is 20233221157. The next prime is 20233221221. The reversal of 20233221209 is 90212233202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19321000000 + 912221209 = 139000^2 + 30203^2 .

It is a cyclic number.

It is not a de Polignac number, because 20233221209 - 2²⁴ = 20216443993 is a prime.

It is not a weakly prime, because it can be changed into another prime (20233221709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10116610604 + 10116610605.

It is an arithmetic number, because the mean of its divisors is an integer number (10116610605).

Almost surely, 2^20233221209 is an apocalyptic number.

It is an amenable number.

20233221209 is a deficient number, since it is larger than the sum of its proper divisors (1).

20233221209 is an equidigital number, since it uses as much as digits as its factorization.

20233221209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

The spelling of 20233221209 in words is "twenty billion, two hundred thirty-three million, two hundred twenty-one thousand, two hundred nine".