31111230223 has 2 divisors, whose sum is σ = 31111230224. Its totient is φ = 31111230222.

The previous prime is 31111230221. The next prime is 31111230229. The reversal of 31111230223 is 32203211113.

It is a weak prime.

It is an emirp because it is prime and its reverse (32203211113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31111230223 - 2¹ = 31111230221 is a prime.

Together with 31111230221, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 31111230223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31111230221) 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, 15555615111 + 15555615112.

It is an arithmetic number, because the mean of its divisors is an integer number (15555615112).

Almost surely, 2^31111230223 is an apocalyptic number.

31111230223 is a deficient number, since it is larger than the sum of its proper divisors (1).

31111230223 is an equidigital number, since it uses as much as digits as its factorization.

31111230223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31111230223 its reverse (32203211113), we get a palindrome (63314441336).

The spelling of 31111230223 in words is "thirty-one billion, one hundred eleven million, two hundred thirty thousand, two hundred twenty-three".