20211122202111 has 24 divisors (see below), whose sum is σ = 29983299834384. Its totient is φ = 13109727398400.

The previous prime is 20211122202023. The next prime is 20211122202149. The reversal of 20211122202111 is 11120222111202.

20211122202111 is a `hidden beast` number, since 20 + 211 + 1 + 2 + 220 + 211 + 1 = 666.

It is not a de Polignac number, because 20211122202111 - 2¹⁰ = 20211122201087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211122209111) 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, 24779136 + ... + 25581786.

It is an arithmetic number, because the mean of its divisors is an integer number (1249304159766).

Almost surely, 2^{20211122202111} is an apocalyptic number.

20211122202111 is a deficient number, since it is larger than the sum of its proper divisors (9772177632273).

20211122202111 is a wasteful number, since it uses less digits than its factorization.

20211122202111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878311 (or 878308 counting only the distinct ones).

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

Adding to 20211122202111 its reverse (11120222111202), we get a palindrome (31331344313313).

Subtracting from 20211122202111 its reverse (11120222111202), we obtain a palindrome (9090900090909).

The spelling of 20211122202111 in words is "twenty trillion, two hundred eleven billion, one hundred twenty-two million, two hundred two thousand, one hundred eleven".