11112111021005 has 16 divisors (see below), whose sum is σ = 13657771395840. Its totient is φ = 8674594665408.

The previous prime is 11112111021001. The next prime is 11112111021019. The reversal of 11112111021005 is 50012011121111.

It is a cyclic number.

It is not a de Polignac number, because 11112111021005 - 2² = 11112111021001 is a prime.

It is a super-2 number, since 2×11112111021005² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112111021001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24648722 + ... + 25095491.

It is an arithmetic number, because the mean of its divisors is an integer number (853610712240).

Almost surely, 2^{11112111021005} is an apocalyptic number.

It is an amenable number.

11112111021005 is a deficient number, since it is larger than the sum of its proper divisors (2545660374835).

11112111021005 is a wasteful number, since it uses less digits than its factorization.

11112111021005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49745300.

The product of its (nonzero) digits is 20, while the sum is 17.

Adding to 11112111021005 its reverse (50012011121111), we get a palindrome (61124122142116).

The spelling of 11112111021005 in words is "eleven trillion, one hundred twelve billion, one hundred eleven million, twenty-one thousand, five".