21122342211 has 16 divisors (see below), whose sum is σ = 28452147968. Its totient is φ = 13937724000.

The previous prime is 21122342209. The next prime is 21122342243. The reversal of 21122342211 is 11224322112.

It is a happy number.

It is not a de Polignac number, because 21122342211 - 2¹ = 21122342209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21122342611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41316 + ... + 209646.

It is an arithmetic number, because the mean of its divisors is an integer number (1778259248).

Almost surely, 2^21122342211 is an apocalyptic number.

21122342211 is a deficient number, since it is larger than the sum of its proper divisors (7329805757).

21122342211 is a wasteful number, since it uses less digits than its factorization.

21122342211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168762.

The product of its digits is 384, while the sum is 21.

Adding to 21122342211 its reverse (11224322112), we get a palindrome (32346664323).

The spelling of 21122342211 in words is "twenty-one billion, one hundred twenty-two million, three hundred forty-two thousand, two hundred eleven".