111211120111 has 8 divisors (see below), whose sum is σ = 136875224864. Its totient is φ = 87991215840.

The previous prime is 111211120087. The next prime is 111211120123. The reversal of 111211120111 is 111021112111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111211120111 - 2¹⁵ = 111211087343 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 111211120091 and 111211120100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111211120151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 611050020 + ... + 611050201.

It is an arithmetic number, because the mean of its divisors is an integer number (17109403108).

Almost surely, 2^111211120111 is an apocalyptic number.

111211120111 is a deficient number, since it is larger than the sum of its proper divisors (25664104753).

111211120111 is a wasteful number, since it uses less digits than its factorization.

111211120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222100241.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 111211120111 its reverse (111021112111), we get a palindrome (222232232222).

The spelling of 111211120111 in words is "one hundred eleven billion, two hundred eleven million, one hundred twenty thousand, one hundred eleven".