1100211121 has 2 divisors, whose sum is σ = 1100211122. Its totient is φ = 1100211120.

The previous prime is 1100211113. The next prime is 1100211137. The reversal of 1100211121 is 1211120011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1076824225 + 23386896 = 32815^2 + 4836^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100211121 - 2³ = 1100211113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1100211098 and 1100211107.

It is not a weakly prime, because it can be changed into another prime (1100281121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550105560 + 550105561.

It is an arithmetic number, because the mean of its divisors is an integer number (550105561).

Almost surely, 2^1100211121 is an apocalyptic number.

It is an amenable number.

1100211121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100211121 is an equidigital number, since it uses as much as digits as its factorization.

1100211121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 1100211121 is about 33169.4305196818. The cubic root of 1100211121 is about 1032.3461524470.

Adding to 1100211121 its reverse (1211120011), we get a palindrome (2311331132).

The spelling of 1100211121 in words is "one billion, one hundred million, two hundred eleven thousand, one hundred twenty-one".