11121010111111 has 4 divisors (see below), whose sum is σ = 11129584522672. Its totient is φ = 11112435699552.

The previous prime is 11121010111067. The next prime is 11121010111121. The reversal of 11121010111111 is 11111101012111.

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 11121010111111 - 2¹⁷ = 11121009980039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11121010111091 and 11121010111100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121010111121) 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, 4287203835 + ... + 4287206428.

It is an arithmetic number, because the mean of its divisors is an integer number (2782396130668).

Almost surely, 2^{11121010111111} is an apocalyptic number.

11121010111111 is a deficient number, since it is larger than the sum of its proper divisors (8574411561).

11121010111111 is an equidigital number, since it uses as much as digits as its factorization.

11121010111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8574411560.

The product of its (nonzero) digits is 2, while the sum is 13.

Adding to 11121010111111 its reverse (11111101012111), we get a palindrome (22232111123222).

The spelling of 11121010111111 in words is "eleven trillion, one hundred twenty-one billion, ten million, one hundred eleven thousand, one hundred eleven".