911128321 has 2 divisors, whose sum is σ = 911128322. Its totient is φ = 911128320.

The previous prime is 911128313. The next prime is 911128357. The reversal of 911128321 is 123821119.

911128321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 481188096 + 429940225 = 21936^2 + 20735^2 .

It is a cyclic number.

It is not a de Polignac number, because 911128321 - 2³ = 911128313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 911128321.

It is not a weakly prime, because it can be changed into another prime (911128301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 455564160 + 455564161.

It is an arithmetic number, because the mean of its divisors is an integer number (455564161).

Almost surely, 2^911128321 is an apocalyptic number.

It is an amenable number.

911128321 is a deficient number, since it is larger than the sum of its proper divisors (1).

911128321 is an equidigital number, since it uses as much as digits as its factorization.

911128321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 28.

The square root of 911128321 is about 30184.9022029226. The cubic root of 911128321 is about 969.4524564192.

The spelling of 911128321 in words is "nine hundred eleven million, one hundred twenty-eight thousand, three hundred twenty-one".