20111022220221 has 20 divisors (see below), whose sum is σ = 30043205757312. Its totient is φ = 13406984633448.

The previous prime is 20111022220169. The next prime is 20111022220363. The reversal of 20111022220221 is 12202222011102.

It is a happy number.

20111022220221 is a `hidden beast` number, since 201 + 1 + 1 + 0 + 22 + 220 + 221 = 666.

It is not a de Polignac number, because 20111022220221 - 2¹⁷ = 20111022089149 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20111022220194 and 20111022220203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111022228221) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 343275 + ... + 6351368.

Almost surely, 2^{20111022220221} is an apocalyptic number.

It is an amenable number.

20111022220221 is a deficient number, since it is larger than the sum of its proper divisors (9932183537091).

20111022220221 is an equidigital number, since it uses as much as digits as its factorization.

20111022220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6731742 (or 6731733 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20111022220221 its reverse (12202222011102), we get a palindrome (32313244231323).

The spelling of 20111022220221 in words is "twenty trillion, one hundred eleven billion, twenty-two million, two hundred twenty thousand, two hundred twenty-one".