111212110120111 has 64 divisors (see below), whose sum is σ = 156404368834560. Its totient is φ = 76223847047040.

The previous prime is 111212110120093. The next prime is 111212110120123. The reversal of 111212110120111 is 111021011212111.

It is not a de Polignac number, because 111212110120111 - 2²⁵ = 111212076565679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111212110123111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3128371 + ... + 15238468.

It is an arithmetic number, because the mean of its divisors is an integer number (2443818263040).

Almost surely, 2^{111212110120111} is an apocalyptic number.

111212110120111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111212110120111 is a deficient number, since it is larger than the sum of its proper divisors (45192258714449).

111212110120111 is a wasteful number, since it uses less digits than its factorization.

111212110120111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18367156.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 111212110120111 its reverse (111021011212111), we get a palindrome (222233121332222).

The spelling of 111212110120111 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred ten million, one hundred twenty thousand, one hundred eleven".