21211322222311 has 4 divisors (see below), whose sum is σ = 22842962393272. Its totient is φ = 19579682051352.

The previous prime is 21211322222309. The next prime is 21211322222317. The reversal of 21211322222311 is 11322222311212.

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 21211322222311 - 2¹ = 21211322222309 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 (21211322222317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 815820085461 + ... + 815820085486.

It is an arithmetic number, because the mean of its divisors is an integer number (5710740598318).

Almost surely, 2^{21211322222311} is an apocalyptic number.

21211322222311 is a deficient number, since it is larger than the sum of its proper divisors (1631640170961).

21211322222311 is a wasteful number, since it uses less digits than its factorization.

21211322222311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631640170960.

The product of its digits is 1152, while the sum is 25.

Adding to 21211322222311 its reverse (11322222311212), we get a palindrome (32533544533523).

The spelling of 21211322222311 in words is "twenty-one trillion, two hundred eleven billion, three hundred twenty-two million, two hundred twenty-two thousand, three hundred eleven".