311312021303 has 2 divisors, whose sum is σ = 311312021304. Its totient is φ = 311312021302.

The previous prime is 311312021287. The next prime is 311312021309. The reversal of 311312021303 is 303120213113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 311312021303 - 2⁴ = 311312021287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311312021309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155656010651 + 155656010652.

It is an arithmetic number, because the mean of its divisors is an integer number (155656010652).

Almost surely, 2^311312021303 is an apocalyptic number.

311312021303 is a deficient number, since it is larger than the sum of its proper divisors (1).

311312021303 is an equidigital number, since it uses as much as digits as its factorization.

311312021303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 311312021303 its reverse (303120213113), we get a palindrome (614432234416).

The spelling of 311312021303 in words is "three hundred eleven billion, three hundred twelve million, twenty-one thousand, three hundred three".