201231211331231 has 2 divisors, whose sum is σ = 201231211331232. Its totient is φ = 201231211331230.

The previous prime is 201231211331203. The next prime is 201231211331243. The reversal of 201231211331231 is 132133112132102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201231211331231 - 2⁶ = 201231211331167 is a prime.

It is a super-2 number, since 2×201231211331231² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 201231211331231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201231211337231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100615605665615 + 100615605665616.

It is an arithmetic number, because the mean of its divisors is an integer number (100615605665616).

Almost surely, 2^{201231211331231} is an apocalyptic number.

201231211331231 is a deficient number, since it is larger than the sum of its proper divisors (1).

201231211331231 is an equidigital number, since it uses as much as digits as its factorization.

201231211331231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

Adding to 201231211331231 its reverse (132133112132102), we get a palindrome (333364323463333).

The spelling of 201231211331231 in words is "two hundred one trillion, two hundred thirty-one billion, two hundred eleven million, three hundred thirty-one thousand, two hundred thirty-one".