1101121009 has 2 divisors, whose sum is σ = 1101121010. Its totient is φ = 1101121008.

The previous prime is 1101120997. The next prime is 1101121033. The reversal of 1101121009 is 9001211011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 612711009 + 488410000 = 24753^2 + 22100^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101121009 - 2⁹ = 1101120497 is a prime.

It is a super-2 number, since 2×1101121009² = 2424934952922356162, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1101120983 and 1101121001.

It is not a weakly prime, because it can be changed into another prime (1101124009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550560504 + 550560505.

It is an arithmetic number, because the mean of its divisors is an integer number (550560505).

Almost surely, 2^1101121009 is an apocalyptic number.

It is an amenable number.

1101121009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101121009 is an equidigital number, since it uses as much as digits as its factorization.

1101121009 is an evil number, because the sum of its binary digits is even.

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

The square root of 1101121009 is about 33183.1434466357. The cubic root of 1101121009 is about 1032.6306616453.

The spelling of 1101121009 in words is "one billion, one hundred one million, one hundred twenty-one thousand, nine".