20231001221231 has 2 divisors, whose sum is σ = 20231001221232. Its totient is φ = 20231001221230.

The previous prime is 20231001221201. The next prime is 20231001221261. The reversal of 20231001221231 is 13212210013202.

It is a balanced prime because it is at equal distance from previous prime (20231001221201) and next prime (20231001221261).

It is a cyclic number.

It is not a de Polignac number, because 20231001221231 - 2¹⁰ = 20231001220207 is a prime.

It is a super-2 number, since 2×20231001221231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20231001221201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10115500610615 + 10115500610616.

It is an arithmetic number, because the mean of its divisors is an integer number (10115500610616).

Almost surely, 2^{20231001221231} is an apocalyptic number.

20231001221231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20231001221231 is an equidigital number, since it uses as much as digits as its factorization.

20231001221231 is an odious number, because the sum of its binary digits is odd.

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

Adding to 20231001221231 its reverse (13212210013202), we get a palindrome (33443211234433).

The spelling of 20231001221231 in words is "twenty trillion, two hundred thirty-one billion, one million, two hundred twenty-one thousand, two hundred thirty-one".