311430000310021 has 2 divisors, whose sum is σ = 311430000310022. Its totient is φ = 311430000310020.

The previous prime is 311430000309991. The next prime is 311430000310049. The reversal of 311430000310021 is 120013000034113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164327401950625 + 147102598359396 = 12819025^2 + 12128586^2 .

It is a cyclic number.

It is not a de Polignac number, because 311430000310021 - 2⁷ = 311430000309893 is a prime.

It is a super-2 number, since 2×311430000310021² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311430000310321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155715000155010 + 155715000155011.

It is an arithmetic number, because the mean of its divisors is an integer number (155715000155011).

Almost surely, 2^{311430000310021} is an apocalyptic number.

It is an amenable number.

311430000310021 is a deficient number, since it is larger than the sum of its proper divisors (1).

311430000310021 is an equidigital number, since it uses as much as digits as its factorization.

311430000310021 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 311430000310021 its reverse (120013000034113), we get a palindrome (431443000344134).

The spelling of 311430000310021 in words is "three hundred eleven trillion, four hundred thirty billion, three hundred ten thousand, twenty-one".