11120121111 has 16 divisors (see below), whose sum is σ = 16448872320. Its totient is φ = 6625237920.

The previous prime is 11120121101. The next prime is 11120121113. The reversal of 11120121111 is 11112102111.

It is not a de Polignac number, because 11120121111 - 2¹⁹ = 11119596823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11120121113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2853760 + ... + 2857653.

It is an arithmetic number, because the mean of its divisors is an integer number (1028054520).

Almost surely, 2^11120121111 is an apocalyptic number.

11120121111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11120121111 is a deficient number, since it is larger than the sum of its proper divisors (5328751209).

11120121111 is a wasteful number, since it uses less digits than its factorization.

11120121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5711486.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 11120121111 its reverse (11112102111), we get a palindrome (22232223222).

It can be divided in two parts, 11120 and 121111, that added together give a palindrome (132231).

The spelling of 11120121111 in words is "eleven billion, one hundred twenty million, one hundred twenty-one thousand, one hundred eleven".