21222222211101 has 16 divisors (see below), whose sum is σ = 29072268945344. Its totient is φ = 13760456753664.

The previous prime is 21222222211033. The next prime is 21222222211109. The reversal of 21222222211101 is 10111222222212.

It is not a de Polignac number, because 21222222211101 - 2¹¹ = 21222222209053 is a prime.

It is a super-3 number, since 3×21222222211101³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222222211109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36578971 + ... + 37154616.

It is an arithmetic number, because the mean of its divisors is an integer number (1817016809084).

Almost surely, 2^{21222222211101} is an apocalyptic number.

It is an amenable number.

21222222211101 is a deficient number, since it is larger than the sum of its proper divisors (7850046734243).

21222222211101 is a wasteful number, since it uses less digits than its factorization.

21222222211101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73736220.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 21222222211101 its reverse (10111222222212), we get a palindrome (31333444433313).

The spelling of 21222222211101 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty-two million, two hundred eleven thousand, one hundred one".