21112011110109 has 32 divisors (see below), whose sum is σ = 30592307404800. Its totient is φ = 12899755706112.

The previous prime is 21112011110087. The next prime is 21112011110171. The reversal of 21112011110109 is 90101111021112.

It is a happy number.

It is not a de Polignac number, because 21112011110109 - 2¹⁶ = 21112011044573 is a prime.

It is a super-2 number, since 2×21112011110109² (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 (21112011110189) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21652849 + ... + 22606854.

It is an arithmetic number, because the mean of its divisors is an integer number (956009606400).

Almost surely, 2^{21112011110109} is an apocalyptic number.

It is an amenable number.

21112011110109 is a deficient number, since it is larger than the sum of its proper divisors (9480296294691).

21112011110109 is a wasteful number, since it uses less digits than its factorization.

21112011110109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44259969.

The product of its (nonzero) digits is 36, while the sum is 21.

The spelling of 21112011110109 in words is "twenty-one trillion, one hundred twelve billion, eleven million, one hundred ten thousand, one hundred nine".