11211200000111 has 4 divisors (see below), whose sum is σ = 11229489070872. Its totient is φ = 11192910929352.

The previous prime is 11211199999973. The next prime is 11211200000123. The reversal of 11211200000111 is 11100000211211.

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 11211200000111 - 2⁴² = 6813153489007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11211200000092 and 11211200000101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211200000191) 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, 9144534461 + ... + 9144535686.

It is an arithmetic number, because the mean of its divisors is an integer number (2807372267718).

Almost surely, 2^{11211200000111} is an apocalyptic number.

11211200000111 is a deficient number, since it is larger than the sum of its proper divisors (18289070761).

11211200000111 is an equidigital number, since it uses as much as digits as its factorization.

11211200000111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18289070760.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 11211200000111 its reverse (11100000211211), we get a palindrome (22311200211322).

The spelling of 11211200000111 in words is "eleven trillion, two hundred eleven billion, two hundred million, one hundred eleven", and thus it is an aban number.