212210111111 has 4 divisors (see below), whose sum is σ = 212540143032. Its totient is φ = 211880079192.

The previous prime is 212210111107. The next prime is 212210111137. The reversal of 212210111111 is 111111012212.

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 212210111111 - 2² = 212210111107 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 (212210110111) 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, 165014996 + ... + 165016281.

It is an arithmetic number, because the mean of its divisors is an integer number (53135035758).

Almost surely, 2^212210111111 is an apocalyptic number.

212210111111 is a deficient number, since it is larger than the sum of its proper divisors (330031921).

212210111111 is an equidigital number, since it uses as much as digits as its factorization.

212210111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330031920.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 212210111111 its reverse (111111012212), we get a palindrome (323321123323).

The spelling of 212210111111 in words is "two hundred twelve billion, two hundred ten million, one hundred eleven thousand, one hundred eleven".