20211313222111 has 4 divisors (see below), whose sum is σ = 22048705333224. Its totient is φ = 18373921111000.

The previous prime is 20211313222109. The next prime is 20211313222169. The reversal of 20211313222111 is 11122231311202.

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 20211313222111 - 2¹ = 20211313222109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211313222171) 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, 918696055540 + ... + 918696055561.

It is an arithmetic number, because the mean of its divisors is an integer number (5512176333306).

Almost surely, 2^{20211313222111} is an apocalyptic number.

20211313222111 is a deficient number, since it is larger than the sum of its proper divisors (1837392111113).

20211313222111 is a wasteful number, since it uses less digits than its factorization.

20211313222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1837392111112.

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

Adding to 20211313222111 its reverse (11122231311202), we get a palindrome (31333544533313).

The spelling of 20211313222111 in words is "twenty trillion, two hundred eleven billion, three hundred thirteen million, two hundred twenty-two thousand, one hundred eleven".