12011100111005 has 8 divisors (see below), whose sum is σ = 14414751648600. Its totient is φ = 9607925745216.

The previous prime is 12011100110981. The next prime is 12011100111019. The reversal of 12011100111005 is 50011100111021.

It can be written as a sum of positive squares in 4 ways, for example, as 35472332281 + 11975627778724 = 188341^2 + 3460582^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12011100111005 - 2⁸ = 12011100110749 is a prime.

It is a super-2 number, since 2×12011100111005² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119237570 + ... + 119338259.

It is an arithmetic number, because the mean of its divisors is an integer number (1801843956075).

Almost surely, 2^{12011100111005} is an apocalyptic number.

It is an amenable number.

12011100111005 is a deficient number, since it is larger than the sum of its proper divisors (2403651537595).

12011100111005 is a wasteful number, since it uses less digits than its factorization.

12011100111005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238585903.

The product of its (nonzero) digits is 10, while the sum is 14.

Adding to 12011100111005 its reverse (50011100111021), we get a palindrome (62022200222026).

The spelling of 12011100111005 in words is "twelve trillion, eleven billion, one hundred million, one hundred eleven thousand, five".