1101211009 has 2 divisors, whose sum is σ = 1101211010. Its totient is φ = 1101211008.

The previous prime is 1101210991. The next prime is 1101211061. The reversal of 1101211009 is 9001121011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1035552400 + 65658609 = 32180^2 + 8103^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101211009 - 2¹¹ = 1101208961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1101210983 and 1101211001.

It is not a weakly prime, because it can be changed into another prime (1101211079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550605504 + 550605505.

It is an arithmetic number, because the mean of its divisors is an integer number (550605505).

Almost surely, 2^1101211009 is an apocalyptic number.

It is an amenable number.

1101211009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101211009 is an equidigital number, since it uses as much as digits as its factorization.

1101211009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 16.

The square root of 1101211009 is about 33184.4995291476. The cubic root of 1101211009 is about 1032.6587948619.

The spelling of 1101211009 in words is "one billion, one hundred one million, two hundred eleven thousand, nine".