21111120211101 has 16 divisors (see below), whose sum is σ = 31099757652864. Its totient is φ = 12670271634944.

The previous prime is 21111120211003. The next prime is 21111120211109. The reversal of 21111120211101 is 10111202111112.

It is a cyclic number.

It is not a de Polignac number, because 21111120211101 - 2¹⁵ = 21111120178333 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111120211109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8998771296 + ... + 8998773641.

It is an arithmetic number, because the mean of its divisors is an integer number (1943734853304).

Almost surely, 2^{21111120211101} is an apocalyptic number.

It is an amenable number.

21111120211101 is a deficient number, since it is larger than the sum of its proper divisors (9988637441763).

21111120211101 is a wasteful number, since it uses less digits than its factorization.

21111120211101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17997544980.

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

Adding to 21111120211101 its reverse (10111202111112), we get a palindrome (31222322322213).

The spelling of 21111120211101 in words is "twenty-one trillion, one hundred eleven billion, one hundred twenty million, two hundred eleven thousand, one hundred one".