12012031232021 has 4 divisors (see below), whose sum is σ = 12012353800512. Its totient is φ = 12011708663532.

The previous prime is 12012031231999. The next prime is 12012031232023. The reversal of 12012031232021 is 12023213021021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12012031232021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12012031231984 and 12012031232002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012031232023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161228381 + ... + 161302866.

It is an arithmetic number, because the mean of its divisors is an integer number (3003088450128).

Almost surely, 2^{12012031232021} is an apocalyptic number.

It is an amenable number.

12012031232021 is a deficient number, since it is larger than the sum of its proper divisors (322568491).

12012031232021 is an equidigital number, since it uses as much as digits as its factorization.

12012031232021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322568490.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 12012031232021 its reverse (12023213021021), we get a palindrome (24035244253042).

The spelling of 12012031232021 in words is "twelve trillion, twelve billion, thirty-one million, two hundred thirty-two thousand, twenty-one".