111212000212111 has 4 divisors (see below), whose sum is σ = 111212023541112. Its totient is φ = 111211976883112.

The previous prime is 111212000212067. The next prime is 111212000212163.

111212000212111 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111212000212111 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 (111212000212211) 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, 1645000 + ... + 15004333.

It is an arithmetic number, because the mean of its divisors is an integer number (27803005885278).

Almost surely, 2^{111212000212111} is an apocalyptic number.

111212000212111 is a deficient number, since it is larger than the sum of its proper divisors (23329001).

111212000212111 is an equidigital number, since it uses as much as digits as its factorization.

111212000212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23329000.

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

It can be divided in two parts, 111212000 and 212111, that added together give a palindrome (111424111).

The spelling of 111212000212111 in words is "one hundred eleven trillion, two hundred twelve billion, two hundred twelve thousand, one hundred eleven".