20320122211 has 4 divisors (see below), whose sum is σ = 20322468432. Its totient is φ = 20317775992.

The previous prime is 20320122197. The next prime is 20320122307. The reversal of 20320122211 is 11222102302.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20320122211 - 2⁹ = 20320121699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20320122311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1160071 + ... + 1177456.

It is an arithmetic number, because the mean of its divisors is an integer number (5080617108).

Almost surely, 2^20320122211 is an apocalyptic number.

20320122211 is a deficient number, since it is larger than the sum of its proper divisors (2346221).

20320122211 is an equidigital number, since it uses as much as digits as its factorization.

20320122211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2346220.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20320122211 its reverse (11222102302), we get a palindrome (31542224513).

The spelling of 20320122211 in words is "twenty billion, three hundred twenty million, one hundred twenty-two thousand, two hundred eleven".