22111211110221 has 30 divisors (see below), whose sum is σ = 33665300534250. Its totient is φ = 14462678816352.

The previous prime is 22111211110201. The next prime is 22111211110231. The reversal of 22111211110221 is 12201111211122.

It is a happy number.

22111211110221 is a `hidden beast` number, since 2 + 211 + 121 + 1 + 110 + 221 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 13552742774025 + 8558468336196 = 3681405^2 + 2925486^2 .

It is not a de Polignac number, because 22111211110221 - 2¹⁵ = 22111211077453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22111211110194 and 22111211110203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111211110201) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 48362346 + ... + 48817403.

It is an arithmetic number, because the mean of its divisors is an integer number (1122176684475).

Almost surely, 2^{22111211110221} is an apocalyptic number.

It is an amenable number.

22111211110221 is a deficient number, since it is larger than the sum of its proper divisors (11554089424029).

22111211110221 is an frugal number, since it uses more digits than its factorization.

22111211110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97179867 (or 97179805 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 22111211110221 its reverse (12201111211122), we get a palindrome (34312322321343).

The spelling of 22111211110221 in words is "twenty-two trillion, one hundred eleven billion, two hundred eleven million, one hundred ten thousand, two hundred twenty-one".