111121110111111 has 16 divisors (see below), whose sum is σ = 148690435373568. Its totient is φ = 73816268456000.

The previous prime is 111121110111083. The next prime is 111121110111119. The reversal of 111121110111111 is 111111011121111.

It is a cyclic number.

It is not a de Polignac number, because 111121110111111 - 2⁶ = 111121110111047 is a prime.

It is a super-2 number, since 2×111121110111111² (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 (111121110111119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78414130 + ... + 79818656.

It is an arithmetic number, because the mean of its divisors is an integer number (9293152210848).

Almost surely, 2^{111121110111111} is an apocalyptic number.

111121110111111 is a deficient number, since it is larger than the sum of its proper divisors (37569325262457).

111121110111111 is a wasteful number, since it uses less digits than its factorization.

111121110111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498662.

The product of its (nonzero) digits is 2, while the sum is 15.

Adding to 111121110111111 its reverse (111111011121111), we get a palindrome (222232121232222).

The spelling of 111121110111111 in words is "one hundred eleven trillion, one hundred twenty-one billion, one hundred ten million, one hundred eleven thousand, one hundred eleven".