212212111111 has 64 divisors (see below), whose sum is σ = 288804934656. Its totient is φ = 150574464000.

The previous prime is 212212111093. The next prime is 212212111117. The reversal of 212212111111 is 111111212212.

It is a cyclic number.

It is not a de Polignac number, because 212212111111 - 2⁵ = 212212111079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212212111117) 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, 28607875 + ... + 28615291.

It is an arithmetic number, because the mean of its divisors is an integer number (4512577104).

Almost surely, 2^212212111111 is an apocalyptic number.

212212111111 is a deficient number, since it is larger than the sum of its proper divisors (76592823545).

212212111111 is a wasteful number, since it uses less digits than its factorization.

212212111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7832.

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

Adding to 212212111111 its reverse (111111212212), we get a palindrome (323323323323).

It can be divided in two parts, 212212 and 111111, that added together give a palindrome (323323).

The spelling of 212212111111 in words is "two hundred twelve billion, two hundred twelve million, one hundred eleven thousand, one hundred eleven".