22011331221 has 12 divisors (see below), whose sum is σ = 34684522080. Its totient is φ = 13340200680.

The previous prime is 22011331219. The next prime is 22011331241. The reversal of 22011331221 is 12213311022.

22011331221 is a `hidden beast` number, since 220 + 113 + 312 + 21 = 666.

It is not a de Polignac number, because 22011331221 - 2¹ = 22011331219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22011331194 and 22011331203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22011331201) 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 11 ways as a sum of consecutive naturals, for example, 111168241 + ... + 111168438.

It is an arithmetic number, because the mean of its divisors is an integer number (2890376840).

Almost surely, 2^22011331221 is an apocalyptic number.

It is an amenable number.

22011331221 is a deficient number, since it is larger than the sum of its proper divisors (12673190859).

22011331221 is a wasteful number, since it uses less digits than its factorization.

22011331221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222336696 (or 222336693 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 22011331221 its reverse (12213311022), we get a palindrome (34224642243).

The spelling of 22011331221 in words is "twenty-two billion, eleven million, three hundred thirty-one thousand, two hundred twenty-one".