311022413021 has 2 divisors, whose sum is σ = 311022413022. Its totient is φ = 311022413020.

The previous prime is 311022412979. The next prime is 311022413047. The reversal of 311022413021 is 120314220113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157680468100 + 153341944921 = 397090^2 + 391589^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311022413021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311022412984 and 311022413002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311022413321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155511206510 + 155511206511.

It is an arithmetic number, because the mean of its divisors is an integer number (155511206511).

Almost surely, 2^311022413021 is an apocalyptic number.

It is an amenable number.

311022413021 is a deficient number, since it is larger than the sum of its proper divisors (1).

311022413021 is an equidigital number, since it uses as much as digits as its factorization.

311022413021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 311022413021 its reverse (120314220113), we get a palindrome (431336633134).

The spelling of 311022413021 in words is "three hundred eleven billion, twenty-two million, four hundred thirteen thousand, twenty-one".