12011112211021 has 16 divisors (see below), whose sum is σ = 15855769215360. Its totient is φ = 8808760673280.

The previous prime is 12011112211019. The next prime is 12011112211057. The reversal of 12011112211021 is 12011221111021.

It is a cyclic number.

It is not a de Polignac number, because 12011112211021 - 2¹ = 12011112211019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12011112210986 and 12011112211004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011112217021) 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, 4587894876 + ... + 4587897493.

It is an arithmetic number, because the mean of its divisors is an integer number (990985575960).

Almost surely, 2^{12011112211021} is an apocalyptic number.

12011112211021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12011112211021 is a deficient number, since it is larger than the sum of its proper divisors (3844657004339).

12011112211021 is a wasteful number, since it uses less digits than its factorization.

12011112211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9175792404.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 12011112211021 its reverse (12011221111021), we get a palindrome (24022333322042).

The spelling of 12011112211021 in words is "twelve trillion, eleven billion, one hundred twelve million, two hundred eleven thousand, twenty-one".