201223031231 has 2 divisors, whose sum is σ = 201223031232. Its totient is φ = 201223031230.

The previous prime is 201223031221. The next prime is 201223031263. The reversal of 201223031231 is 132130322102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201223031231 - 2¹⁰ = 201223030207 is a prime.

It is a super-2 number, since 2×201223031231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201223031221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100611515615 + 100611515616.

It is an arithmetic number, because the mean of its divisors is an integer number (100611515616).

Almost surely, 2^201223031231 is an apocalyptic number.

201223031231 is a deficient number, since it is larger than the sum of its proper divisors (1).

201223031231 is an equidigital number, since it uses as much as digits as its factorization.

201223031231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 201223031231 its reverse (132130322102), we get a palindrome (333353353333).

The spelling of 201223031231 in words is "two hundred one billion, two hundred twenty-three million, thirty-one thousand, two hundred thirty-one".