22011110212221 has 48 divisors (see below), whose sum is σ = 34575507622656. Its totient is φ = 13412991253248.

The previous prime is 22011110212183. The next prime is 22011110212229. The reversal of 22011110212221 is 12221201111022.

22011110212221 is a `hidden beast` number, since 220 + 1 + 1 + 1 + 10 + 212 + 221 = 666.

It is not a de Polignac number, because 22011110212221 - 2²⁷ = 22010975994493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22011110212194 and 22011110212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22011110212229) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2997081 + ... + 7280433.

It is an arithmetic number, because the mean of its divisors is an integer number (720323075472).

Almost surely, 2^{22011110212221} is an apocalyptic number.

It is an amenable number.

22011110212221 is a deficient number, since it is larger than the sum of its proper divisors (12564397410435).

22011110212221 is a wasteful number, since it uses less digits than its factorization.

22011110212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4283802 (or 4283799 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 22011110212221 its reverse (12221201111022), we get a palindrome (34232311323243).

The spelling of 22011110212221 in words is "twenty-two trillion, eleven billion, one hundred ten million, two hundred twelve thousand, two hundred twenty-one".