311203120223 has 2 divisors, whose sum is σ = 311203120224. Its totient is φ = 311203120222.

The previous prime is 311203120219. The next prime is 311203120231. The reversal of 311203120223 is 322021302113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 311203120223 - 2² = 311203120219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311203120195 and 311203120204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311203120213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155601560111 + 155601560112.

It is an arithmetic number, because the mean of its divisors is an integer number (155601560112).

Almost surely, 2^311203120223 is an apocalyptic number.

311203120223 is a deficient number, since it is larger than the sum of its proper divisors (1).

311203120223 is an equidigital number, since it uses as much as digits as its factorization.

311203120223 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 311203120223 its reverse (322021302113), we get a palindrome (633224422336).

The spelling of 311203120223 in words is "three hundred eleven billion, two hundred three million, one hundred twenty thousand, two hundred twenty-three".