1001121089 has 2 divisors, whose sum is σ = 1001121090. Its totient is φ = 1001121088.

The previous prime is 1001121059. The next prime is 1001121119. The reversal of 1001121089 is 9801211001.

It is a balanced prime because it is at equal distance from previous prime (1001121059) and next prime (1001121119).

It can be written as a sum of positive squares in only one way, i.e., 653671489 + 347449600 = 25567^2 + 18640^2 .

It is an emirp because it is prime and its reverse (9801211001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1001121089 - 2²⁴ = 984343873 is a prime.

It is not a weakly prime, because it can be changed into another prime (1001121059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500560544 + 500560545.

It is an arithmetic number, because the mean of its divisors is an integer number (500560545).

Almost surely, 2^1001121089 is an apocalyptic number.

It is an amenable number.

1001121089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001121089 is an equidigital number, since it uses as much as digits as its factorization.

1001121089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 23.

The square root of 1001121089 is about 31640.4976098670. The cubic root of 1001121089 is about 1000.3735567713.

The spelling of 1001121089 in words is "one billion, one million, one hundred twenty-one thousand, eighty-nine".