111121010111111 has 64 divisors (see below), whose sum is σ = 150378945970176. Its totient is φ = 79294596451200.

The previous prime is 111121010111107. The next prime is 111121010111113. The reversal of 111121010111111 is 111111010121111.

It is not a de Polignac number, because 111121010111111 - 2² = 111121010111107 is a prime.

It is a super-2 number, since 2×111121010111111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111121010111113) 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 63 ways as a sum of consecutive naturals, for example, 469724120 + ... + 469960626.

It is an arithmetic number, because the mean of its divisors is an integer number (2349671030784).

Almost surely, 2^{111121010111111} is an apocalyptic number.

111121010111111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111121010111111 is a deficient number, since it is larger than the sum of its proper divisors (39257935859065).

111121010111111 is a wasteful number, since it uses less digits than its factorization.

111121010111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240252.

The product of its (nonzero) digits is 2, while the sum is 14.

Adding to 111121010111111 its reverse (111111010121111), we get a palindrome (222232020232222).

The spelling of 111121010111111 in words is "one hundred eleven trillion, one hundred twenty-one billion, ten million, one hundred eleven thousand, one hundred eleven".