2012211111 has 4 divisors (see below), whose sum is σ = 2682948152. Its totient is φ = 1341474072.

The previous prime is 2012211109. The next prime is 2012211127. The reversal of 2012211111 is 1111122102.

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

It is not a de Polignac number, because 2012211111 - 2¹ = 2012211109 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 (2012211151) 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, 335368516 + ... + 335368521.

It is an arithmetic number, because the mean of its divisors is an integer number (670737038).

Almost surely, 2^2012211111 is an apocalyptic number.

2012211111 is a deficient number, since it is larger than the sum of its proper divisors (670737041).

2012211111 is an equidigital number, since it uses as much as digits as its factorization.

2012211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670737040.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 2012211111 is about 44857.6761658470. The cubic root of 2012211111 is about 1262.4800215902.

Adding to 2012211111 its reverse (1111122102), we get a palindrome (3123333213).

The spelling of 2012211111 in words is "two billion, twelve million, two hundred eleven thousand, one hundred eleven".