20212320211 has 4 divisors (see below), whose sum is σ = 20909296800. Its totient is φ = 19515343624.

The previous prime is 20212320173. The next prime is 20212320229. The reversal of 20212320211 is 11202321202.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20212320211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20212320311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348488251 + ... + 348488308.

It is an arithmetic number, because the mean of its divisors is an integer number (5227324200).

Almost surely, 2^20212320211 is an apocalyptic number.

20212320211 is a deficient number, since it is larger than the sum of its proper divisors (696976589).

20212320211 is an equidigital number, since it uses as much as digits as its factorization.

20212320211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696976588.

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

Adding to 20212320211 its reverse (11202321202), we get a palindrome (31414641413).

Subtracting from 20212320211 its reverse (11202321202), we obtain a palindrome (9009999009).

It can be divided in two parts, 2021 and 2320211, that added together give a palindrome (2322232).

The spelling of 20212320211 in words is "twenty billion, two hundred twelve million, three hundred twenty thousand, two hundred eleven".