11012211111 has 64 divisors (see below), whose sum is σ = 16654219776. Its totient is φ = 6415718400.

The previous prime is 11012211109. The next prime is 11012211131. The reversal of 11012211111 is 11111221011.

It is not a de Polignac number, because 11012211111 - 2¹ = 11012211109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11012211131) 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, 20131740 + ... + 20132286.

It is an arithmetic number, because the mean of its divisors is an integer number (260222184).

Almost surely, 2^11012211111 is an apocalyptic number.

11012211111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11012211111 is a deficient number, since it is larger than the sum of its proper divisors (5642008665).

11012211111 is a wasteful number, since it uses less digits than its factorization.

11012211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 11012211111 its reverse (11111221011), we get a palindrome (22123432122).

It can be divided in two parts, 110 and 12211111, that added together give a palindrome (12211221).

The spelling of 11012211111 in words is "eleven billion, twelve million, two hundred eleven thousand, one hundred eleven".