12011203230021 has 6 divisors (see below), whose sum is σ = 17349515776710. Its totient is φ = 8007468820008.

The previous prime is 12011203229989. The next prime is 12011203230049. The reversal of 12011203230021 is 12003230211021.

12011203230021 is a `hidden beast` number, since 1 + 201 + 120 + 323 + 0 + 0 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12002836469121 + 8366760900 = 3464511^2 + 91470^2 .

It is not a de Polignac number, because 12011203230021 - 2⁵ = 12011203229989 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12011203229976 and 12011203230003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011203230421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 667289068326 + ... + 667289068343.

It is an arithmetic number, because the mean of its divisors is an integer number (2891585962785).

Almost surely, 2^{12011203230021} is an apocalyptic number.

It is an amenable number.

12011203230021 is a deficient number, since it is larger than the sum of its proper divisors (5338312546689).

12011203230021 is a wasteful number, since it uses less digits than its factorization.

12011203230021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334578136675 (or 1334578136672 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12011203230021 its reverse (12003230211021), we get a palindrome (24014433441042).

The spelling of 12011203230021 in words is "twelve trillion, eleven billion, two hundred three million, two hundred thirty thousand, twenty-one".