911121401 has 2 divisors, whose sum is σ = 911121402. Its totient is φ = 911121400.

The previous prime is 911121353. The next prime is 911121451. The reversal of 911121401 is 104121119.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 514155625 + 396965776 = 22675^2 + 19924^2 .

It is an emirp because it is prime and its reverse (104121119) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 911121401 - 2¹⁰ = 911120377 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (911121451) 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, 455560700 + 455560701.

It is an arithmetic number, because the mean of its divisors is an integer number (455560701).

Almost surely, 2^911121401 is an apocalyptic number.

It is an amenable number.

911121401 is a deficient number, since it is larger than the sum of its proper divisors (1).

911121401 is an equidigital number, since it uses as much as digits as its factorization.

911121401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 911121401 is about 30184.7875758634. The cubic root of 911121401 is about 969.4500020895.

The spelling of 911121401 in words is "nine hundred eleven million, one hundred twenty-one thousand, four hundred one".