11211200021111 has 4 divisors (see below), whose sum is σ = 11870682375312. Its totient is φ = 10551717666912.

The previous prime is 11211200021083. The next prime is 11211200021129. The reversal of 11211200021111 is 11112000211211.

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 11211200021111 - 2³⁴ = 11194020151927 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 (11211200021611) 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, 329741177075 + ... + 329741177108.

It is an arithmetic number, because the mean of its divisors is an integer number (2967670593828).

Almost surely, 2^{11211200021111} is an apocalyptic number.

11211200021111 is a deficient number, since it is larger than the sum of its proper divisors (659482354201).

11211200021111 is an equidigital number, since it uses as much as digits as its factorization.

11211200021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659482354200.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 11211200021111 its reverse (11112000211211), we get a palindrome (22323200232322).

The spelling of 11211200021111 in words is "eleven trillion, two hundred eleven billion, two hundred million, twenty-one thousand, one hundred eleven".