22000111211221 has 32 divisors (see below), whose sum is σ = 26104747769856. Its totient is φ = 18277931448000.

The previous prime is 22000111211219. The next prime is 22000111211237. The reversal of 22000111211221 is 12211211100022.

It is a cyclic number.

It is not a de Polignac number, because 22000111211221 - 2¹ = 22000111211219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22000111211195 and 22000111211204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22000111911221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3854320 + ... + 7671766.

It is an arithmetic number, because the mean of its divisors is an integer number (815773367808).

Almost surely, 2^{22000111211221} is an apocalyptic number.

It is an amenable number.

22000111211221 is a deficient number, since it is larger than the sum of its proper divisors (4104636558635).

22000111211221 is a wasteful number, since it uses less digits than its factorization.

22000111211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3817873.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 22000111211221 its reverse (12211211100022), we get a palindrome (34211322311243).

The spelling of 22000111211221 in words is "twenty-two trillion, one hundred eleven million, two hundred eleven thousand, two hundred twenty-one".