11201020021111 has 4 divisors (see below), whose sum is σ = 11474215631424. Its totient is φ = 10927824410800.

The previous prime is 11201020021073. The next prime is 11201020021129. The reversal of 11201020021111 is 11112002010211.

It is a happy number.

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 11201020021111 - 2¹⁵ = 11201019988343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11201020021091 and 11201020021100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201020028111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136597805095 + ... + 136597805176.

It is an arithmetic number, because the mean of its divisors is an integer number (2868553907856).

Almost surely, 2^{11201020021111} is an apocalyptic number.

11201020021111 is a deficient number, since it is larger than the sum of its proper divisors (273195610313).

11201020021111 is an equidigital number, since it uses as much as digits as its factorization.

11201020021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273195610312.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11201020021111 its reverse (11112002010211), we get a palindrome (22313022031322).

The spelling of 11201020021111 in words is "eleven trillion, two hundred one billion, twenty million, twenty-one thousand, one hundred eleven".