311230500423421 has 2 divisors, whose sum is σ = 311230500423422. Its totient is φ = 311230500423420.

The previous prime is 311230500423407. The next prime is 311230500423461. The reversal of 311230500423421 is 124324005032113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209882991300921 + 101347509122500 = 14487339^2 + 10067150^2 .

It is an emirp because it is prime and its reverse (124324005032113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311230500423421 - 2⁵ = 311230500423389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311230500423461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155615250211710 + 155615250211711.

It is an arithmetic number, because the mean of its divisors is an integer number (155615250211711).

Almost surely, 2^{311230500423421} is an apocalyptic number.

It is an amenable number.

311230500423421 is a deficient number, since it is larger than the sum of its proper divisors (1).

311230500423421 is an equidigital number, since it uses as much as digits as its factorization.

311230500423421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 311230500423421 its reverse (124324005032113), we get a palindrome (435554505455534).

The spelling of 311230500423421 in words is "three hundred eleven trillion, two hundred thirty billion, five hundred million, four hundred twenty-three thousand, four hundred twenty-one".