111011212111 has 8 divisors (see below), whose sum is σ = 111804110640. Its totient is φ = 110220052032.

The previous prime is 111011212093. The next prime is 111011212139. The reversal of 111011212111 is 111212110111.

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 111011212111 - 2¹⁵ = 111011179343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111011212091 and 111011212100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111011812111) 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, 306310 + ... + 562003.

It is an arithmetic number, because the mean of its divisors is an integer number (13975513830).

Almost surely, 2^111011212111 is an apocalyptic number.

111011212111 is a deficient number, since it is larger than the sum of its proper divisors (792898529).

111011212111 is an equidigital number, since it uses as much as digits as its factorization.

111011212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869225.

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

Adding to 111011212111 its reverse (111212110111), we get a palindrome (222223322222).

The spelling of 111011212111 in words is "one hundred eleven billion, eleven million, two hundred twelve thousand, one hundred eleven".