311220022123 has 2 divisors, whose sum is σ = 311220022124. Its totient is φ = 311220022122.

The previous prime is 311220022121. The next prime is 311220022163. The reversal of 311220022123 is 321220022113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 311220022123 - 2¹ = 311220022121 is a prime.

Together with 311220022121, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 311220022123.

It is not a weakly prime, because it can be changed into another prime (311220022121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155610011061 + 155610011062.

It is an arithmetic number, because the mean of its divisors is an integer number (155610011062).

Almost surely, 2^311220022123 is an apocalyptic number.

311220022123 is a deficient number, since it is larger than the sum of its proper divisors (1).

311220022123 is an equidigital number, since it uses as much as digits as its factorization.

311220022123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 311220022123 its reverse (321220022113), we get a palindrome (632440044236).

The spelling of 311220022123 in words is "three hundred eleven billion, two hundred twenty million, twenty-two thousand, one hundred twenty-three".