120111011011111 has 4 divisors (see below), whose sum is σ = 120111482786824. Its totient is φ = 120110539235400.

The previous prime is 120111011011109. The next prime is 120111011011141. The reversal of 120111011011111 is 111110110111021.

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 120111011011111 - 2¹ = 120111011011109 is a prime.

It is a super-2 number, since 2×120111011011111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120111011011091 and 120111011011100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120111011011141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235505760 + ... + 236015221.

It is an arithmetic number, because the mean of its divisors is an integer number (30027870696706).

Almost surely, 2^{120111011011111} is an apocalyptic number.

120111011011111 is a deficient number, since it is larger than the sum of its proper divisors (471775713).

120111011011111 is an equidigital number, since it uses as much as digits as its factorization.

120111011011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471775712.

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

Adding to 120111011011111 its reverse (111110110111021), we get a palindrome (231221121122132).

The spelling of 120111011011111 in words is "one hundred twenty trillion, one hundred eleven billion, eleven million, eleven thousand, one hundred eleven".