20211241111 has 4 divisors (see below), whose sum is σ = 20295105424. Its totient is φ = 20127376800.

The previous prime is 20211241091. The next prime is 20211241117. The reversal of 20211241111 is 11114211202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20211241111 - 2¹¹ = 20211239063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211241117) 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 3 ways as a sum of consecutive naturals, for example, 41931795 + ... + 41932276.

It is an arithmetic number, because the mean of its divisors is an integer number (5073776356).

Almost surely, 2^20211241111 is an apocalyptic number.

20211241111 is a deficient number, since it is larger than the sum of its proper divisors (83864313).

20211241111 is an equidigital number, since it uses as much as digits as its factorization.

20211241111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83864312.

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

Adding to 20211241111 its reverse (11114211202), we get a palindrome (31325452313).

The spelling of 20211241111 in words is "twenty billion, two hundred eleven million, two hundred forty-one thousand, one hundred eleven".