22111221210221 has 8 divisors (see below), whose sum is σ = 25976819324064. Its totient is φ = 18554870945520.

The previous prime is 22111221210187. The next prime is 22111221210233. The reversal of 22111221210221 is 12201212211122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22111221210221 - 2¹⁴ = 22111221193837 is a prime.

It is a super-2 number, since 2×22111221210221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22111221210193 and 22111221210202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111221210251) 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 7 ways as a sum of consecutive naturals, for example, 77311962131 + ... + 77311962416.

It is an arithmetic number, because the mean of its divisors is an integer number (3247102415508).

Almost surely, 2^{22111221210221} is an apocalyptic number.

It is an amenable number.

22111221210221 is a deficient number, since it is larger than the sum of its proper divisors (3865598113843).

22111221210221 is a wasteful number, since it uses less digits than its factorization.

22111221210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154623924571.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 22111221210221 its reverse (12201212211122), we get a palindrome (34312433421343).

The spelling of 22111221210221 in words is "twenty-two trillion, one hundred eleven billion, two hundred twenty-one million, two hundred ten thousand, two hundred twenty-one".