28316111321 has 2 divisors, whose sum is σ = 28316111322. Its totient is φ = 28316111320.

The previous prime is 28316111269. The next prime is 28316111347. The reversal of 28316111321 is 12311161382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20067838921 + 8248272400 = 141661^2 + 90820^2 .

It is a cyclic number.

It is not a de Polignac number, because 28316111321 - 2¹⁰ = 28316110297 is a prime.

It is not a weakly prime, because it can be changed into another prime (28316101321) 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, 14158055660 + 14158055661.

It is an arithmetic number, because the mean of its divisors is an integer number (14158055661).

Almost surely, 2^28316111321 is an apocalyptic number.

It is an amenable number.

28316111321 is a deficient number, since it is larger than the sum of its proper divisors (1).

28316111321 is an equidigital number, since it uses as much as digits as its factorization.

28316111321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 29.

The spelling of 28316111321 in words is "twenty-eight billion, three hundred sixteen million, one hundred eleven thousand, three hundred twenty-one".