120111011111 has 32 divisors (see below), whose sum is σ = 149100822528. Its totient is φ = 94216348800.

The previous prime is 120111011107. The next prime is 120111011123. The reversal of 120111011111 is 111110111021.

It is a happy number.

It is not a de Polignac number, because 120111011111 - 2² = 120111011107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120111011092 and 120111011101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120111011131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21065561 + ... + 21071261.

It is an arithmetic number, because the mean of its divisors is an integer number (4659400704).

Almost surely, 2^120111011111 is an apocalyptic number.

120111011111 is a deficient number, since it is larger than the sum of its proper divisors (28989811417).

120111011111 is a wasteful number, since it uses less digits than its factorization.

120111011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7671.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 120111011111 its reverse (111110111021), we get a palindrome (231221122132).

The spelling of 120111011111 in words is "one hundred twenty billion, one hundred eleven million, eleven thousand, one hundred eleven".