12111210233021 has 4 divisors (see below), whose sum is σ = 12111263042844. Its totient is φ = 12111157423200.

The previous prime is 12111210232993. The next prime is 12111210233027. The reversal of 12111210233021 is 12033201211121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11909711592025 + 201498640996 = 3451045^2 + 448886^2 .

It is a cyclic number.

It is not a de Polignac number, because 12111210233021 - 2³⁴ = 12094030363837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12111210232984 and 12111210233002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111210233027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26059400 + ... + 26520081.

It is an arithmetic number, because the mean of its divisors is an integer number (3027815760711).

Almost surely, 2^{12111210233021} is an apocalyptic number.

It is an amenable number.

12111210233021 is a deficient number, since it is larger than the sum of its proper divisors (52809823).

12111210233021 is an equidigital number, since it uses as much as digits as its factorization.

12111210233021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52809822.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 12111210233021 its reverse (12033201211121), we get a palindrome (24144411444142).

The spelling of 12111210233021 in words is "twelve trillion, one hundred eleven billion, two hundred ten million, two hundred thirty-three thousand, twenty-one".