311113312020331 has 2 divisors, whose sum is σ = 311113312020332. Its totient is φ = 311113312020330.

The previous prime is 311113312020193. The next prime is 311113312020397. The reversal of 311113312020331 is 133020213311113.

It is a strong prime.

It is an emirp because it is prime and its reverse (133020213311113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311113312020331 - 2⁴⁵ = 275928939931499 is a prime.

It is a super-2 number, since 2×311113312020331² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 311113312020296 and 311113312020305.

It is not a weakly prime, because it can be changed into another prime (311113312020631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155556656010165 + 155556656010166.

It is an arithmetic number, because the mean of its divisors is an integer number (155556656010166).

Almost surely, 2^{311113312020331} is an apocalyptic number.

311113312020331 is a deficient number, since it is larger than the sum of its proper divisors (1).

311113312020331 is an equidigital number, since it uses as much as digits as its factorization.

311113312020331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 311113312020331 its reverse (133020213311113), we get a palindrome (444133525331444).

The spelling of 311113312020331 in words is "three hundred eleven trillion, one hundred thirteen billion, three hundred twelve million, twenty thousand, three hundred thirty-one".