111212133112111 has 4 divisors (see below), whose sum is σ = 111212160462712. Its totient is φ = 111212105761512.

The previous prime is 111212133112103. The next prime is 111212133112147. The reversal of 111212133112111 is 111211331212111.

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 111212133112111 - 2³ = 111212133112103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111212133112151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6221976 + ... + 16159741.

It is an arithmetic number, because the mean of its divisors is an integer number (27803040115678).

Almost surely, 2^{111212133112111} is an apocalyptic number.

111212133112111 is a deficient number, since it is larger than the sum of its proper divisors (27350601).

111212133112111 is an equidigital number, since it uses as much as digits as its factorization.

111212133112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27350600.

The product of its digits is 72, while the sum is 22.

Adding to 111212133112111 its reverse (111211331212111), we get a palindrome (222423464324222).

The spelling of 111212133112111 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred thirty-three million, one hundred twelve thousand, one hundred eleven".