20211121110111 has 48 divisors (see below), whose sum is σ = 27251088609024. Its totient is φ = 13324022400000.

The previous prime is 20211121110109. The next prime is 20211121110113. The reversal of 20211121110111 is 11101112111202.

It is an interprime number because it is at equal distance from previous prime (20211121110109) and next prime (20211121110113).

It is not a de Polignac number, because 20211121110111 - 2¹ = 20211121110109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211121110113) 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 47 ways as a sum of consecutive naturals, for example, 22785930910 + ... + 22785931796.

It is an arithmetic number, because the mean of its divisors is an integer number (567731012688).

Almost surely, 2^{20211121110111} is an apocalyptic number.

20211121110111 is a deficient number, since it is larger than the sum of its proper divisors (7039967498913).

20211121110111 is an equidigital number, since it uses as much as digits as its factorization.

20211121110111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2144 (or 1903 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 20211121110111 its reverse (11101112111202), we get a palindrome (31312233221313).

The spelling of 20211121110111 in words is "twenty trillion, two hundred eleven billion, one hundred twenty-one million, one hundred ten thousand, one hundred eleven".