11121010012111 has 4 divisors (see below), whose sum is σ = 11330840389752. Its totient is φ = 10911179634472.

The previous prime is 11121010012109. The next prime is 11121010012141. The reversal of 11121010012111 is 11121001012111.

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 11121010012111 - 2¹ = 11121010012109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11121010012091 and 11121010012100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121010012141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104915188741 + ... + 104915188846.

It is an arithmetic number, because the mean of its divisors is an integer number (2832710097438).

Almost surely, 2^{11121010012111} is an apocalyptic number.

11121010012111 is a deficient number, since it is larger than the sum of its proper divisors (209830377641).

11121010012111 is an equidigital number, since it uses as much as digits as its factorization.

11121010012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209830377640.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 11121010012111 its reverse (11121001012111), we get a palindrome (22242011024222).

Subtracting from 11121010012111 its reverse (11121001012111), we obtain a square (9000000 = 3000²).

The spelling of 11121010012111 in words is "eleven trillion, one hundred twenty-one billion, ten million, twelve thousand, one hundred eleven".