20211313221211 has 4 divisors (see below), whose sum is σ = 23098643681392. Its totient is φ = 17323982761032.

The previous prime is 20211313221199. The next prime is 20211313221263. The reversal of 20211313221211 is 11212231311202.

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 20211313221211 - 2¹⁷ = 20211313090139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20211313221611) 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, 1443665230080 + ... + 1443665230093.

It is an arithmetic number, because the mean of its divisors is an integer number (5774660920348).

Almost surely, 2^{20211313221211} is an apocalyptic number.

20211313221211 is a deficient number, since it is larger than the sum of its proper divisors (2887330460181).

20211313221211 is an equidigital number, since it uses as much as digits as its factorization.

20211313221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2887330460180.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 20211313221211 its reverse (11212231311202), we get a palindrome (31423544532413).

The spelling of 20211313221211 in words is "twenty trillion, two hundred eleven billion, three hundred thirteen million, two hundred twenty-one thousand, two hundred eleven".