20321211011 has 2 divisors, whose sum is σ = 20321211012. Its totient is φ = 20321211010.

The previous prime is 20321210989. The next prime is 20321211041. The reversal of 20321211011 is 11011212302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20321211011 - 2¹⁴ = 20321194627 is a prime.

It is not a weakly prime, because it can be changed into another prime (20321211041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160605505 + 10160605506.

It is an arithmetic number, because the mean of its divisors is an integer number (10160605506).

Almost surely, 2^20321211011 is an apocalyptic number.

20321211011 is a deficient number, since it is larger than the sum of its proper divisors (1).

20321211011 is an equidigital number, since it uses as much as digits as its factorization.

20321211011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 20321211011 its reverse (11011212302), we get a palindrome (31332423313).

The spelling of 20321211011 in words is "twenty billion, three hundred twenty-one million, two hundred eleven thousand, eleven".