1100001121 has 2 divisors, whose sum is σ = 1100001122. Its totient is φ = 1100001120.

The previous prime is 1100001101. The next prime is 1100001127. The reversal of 1100001121 is 1211000011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1089990225 + 10010896 = 33015^2 + 3164^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100001121 - 2⁹ = 1100000609 is a prime.

It is not a weakly prime, because it can be changed into another prime (1100001127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550000560 + 550000561.

It is an arithmetic number, because the mean of its divisors is an integer number (550000561).

Almost surely, 2^1100001121 is an apocalyptic number.

It is an amenable number.

1100001121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100001121 is an equidigital number, since it uses as much as digits as its factorization.

1100001121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 1100001121 is about 33166.2648032606. The cubic root of 1100001121 is about 1032.2804661187.

Adding to 1100001121 its reverse (1211000011), we get a palindrome (2311001132).

The spelling of 1100001121 in words is "one billion, one hundred million, one thousand, one hundred twenty-one".