20323221011 has 2 divisors, whose sum is σ = 20323221012. Its totient is φ = 20323221010.

The previous prime is 20323220999. The next prime is 20323221029. The reversal of 20323221011 is 11012232302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20323221011 - 2²⁶ = 20256112147 is a prime.

It is not a weakly prime, because it can be changed into another prime (20323221031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10161610505 + 10161610506.

It is an arithmetic number, because the mean of its divisors is an integer number (10161610506).

Almost surely, 2^20323221011 is an apocalyptic number.

20323221011 is a deficient number, since it is larger than the sum of its proper divisors (1).

20323221011 is an equidigital number, since it uses as much as digits as its factorization.

20323221011 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 17.

Adding to 20323221011 its reverse (11012232302), we get a palindrome (31335453313).

The spelling of 20323221011 in words is "twenty billion, three hundred twenty-three million, two hundred twenty-one thousand, eleven".