311411224021 has 2 divisors, whose sum is σ = 311411224022. Its totient is φ = 311411224020.

The previous prime is 311411224009. The next prime is 311411224043. The reversal of 311411224021 is 120422114113.

It is an a-pointer prime, because the next prime (311411224043) can be obtained adding 311411224021 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 289539771921 + 21871452100 = 538089^2 + 147890^2 .

It is a cyclic number.

It is not a de Polignac number, because 311411224021 - 2⁵ = 311411223989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311411223983 and 311411224001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311411224081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155705612010 + 155705612011.

It is an arithmetic number, because the mean of its divisors is an integer number (155705612011).

Almost surely, 2^311411224021 is an apocalyptic number.

It is an amenable number.

311411224021 is a deficient number, since it is larger than the sum of its proper divisors (1).

311411224021 is an equidigital number, since it uses as much as digits as its factorization.

311411224021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 311411224021 its reverse (120422114113), we get a palindrome (431833338134).

The spelling of 311411224021 in words is "three hundred eleven billion, four hundred eleven million, two hundred twenty-four thousand, twenty-one".