31201131223 has 2 divisors, whose sum is σ = 31201131224. Its totient is φ = 31201131222.

The previous prime is 31201131197. The next prime is 31201131253. The reversal of 31201131223 is 32213110213.

It is a weak prime.

It is an emirp because it is prime and its reverse (32213110213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31201131223 - 2³³ = 22611196631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31201131223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31201131253) 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, 15600565611 + 15600565612.

It is an arithmetic number, because the mean of its divisors is an integer number (15600565612).

Almost surely, 2^31201131223 is an apocalyptic number.

31201131223 is a deficient number, since it is larger than the sum of its proper divisors (1).

31201131223 is an equidigital number, since it uses as much as digits as its factorization.

31201131223 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 31201131223 its reverse (32213110213), we get a palindrome (63414241436).

The spelling of 31201131223 in words is "thirty-one billion, two hundred one million, one hundred thirty-one thousand, two hundred twenty-three".