22111010212221 has 24 divisors (see below), whose sum is σ = 36567444240704. Its totient is φ = 12611764488960.

The previous prime is 22111010212211. The next prime is 22111010212223. The reversal of 22111010212221 is 12221201011122.

22111010212221 is a `hidden beast` number, since 2 + 211 + 10 + 10 + 212 + 221 = 666.

It is not a de Polignac number, because 22111010212221 - 2¹⁰ = 22111010211197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22111010212194 and 22111010212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111010212223) 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 23 ways as a sum of consecutive naturals, for example, 320777620 + ... + 320846541.

Almost surely, 2^{22111010212221} is an apocalyptic number.

22111010212221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22111010212221 is a deficient number, since it is larger than the sum of its proper divisors (14456434028483).

22111010212221 is a wasteful number, since it uses less digits than its factorization.

22111010212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641624721 (or 641624718 counting only the distinct ones).

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

Adding to 22111010212221 its reverse (12221201011122), we get a palindrome (34332211223343).

The spelling of 22111010212221 in words is "twenty-two trillion, one hundred eleven billion, ten million, two hundred twelve thousand, two hundred twenty-one".