12020203231 has 2 divisors, whose sum is σ = 12020203232. Its totient is φ = 12020203230.

The previous prime is 12020203193. The next prime is 12020203253. The reversal of 12020203231 is 13230202021.

It is a strong prime.

It is an emirp because it is prime and its reverse (13230202021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12020203231 - 2¹⁹ = 12019678943 is a prime.

It is a super-2 number, since 2×12020203231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12020203271) 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 as a sum of consecutive naturals, namely, 6010101615 + 6010101616.

It is an arithmetic number, because the mean of its divisors is an integer number (6010101616).

Almost surely, 2^12020203231 is an apocalyptic number.

12020203231 is a deficient number, since it is larger than the sum of its proper divisors (1).

12020203231 is an equidigital number, since it uses as much as digits as its factorization.

12020203231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 12020203231 its reverse (13230202021), we get a palindrome (25250405252).

The spelling of 12020203231 in words is "twelve billion, twenty million, two hundred three thousand, two hundred thirty-one".