11211112005 has 16 divisors (see below), whose sum is σ = 18354937920. Its totient is φ = 5840206848.

The previous prime is 11211111997. The next prime is 11211112057. The reversal of 11211112005 is 50021111211.

It is not a de Polignac number, because 11211112005 - 2³ = 11211111997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8690140 + ... + 8691429.

It is an arithmetic number, because the mean of its divisors is an integer number (1147183620).

Almost surely, 2^11211112005 is an apocalyptic number.

11211112005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11211112005 is a deficient number, since it is larger than the sum of its proper divisors (7143825915).

11211112005 is a wasteful number, since it uses less digits than its factorization.

11211112005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17381620.

The product of its (nonzero) digits is 20, while the sum is 15.

Adding to 11211112005 its reverse (50021111211), we get a palindrome (61232223216).

The spelling of 11211112005 in words is "eleven billion, two hundred eleven million, one hundred twelve thousand, five".