1121213309 has 8 divisors (see below), whose sum is σ = 1139601120. Its totient is φ = 1102874256.

The previous prime is 1121213297. The next prime is 1121213311. The reversal of 1121213309 is 9033121211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1121213309 - 2⁴ = 1121213293 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121213339) 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 in 7 ways as a sum of consecutive naturals, for example, 35702 + ... + 59304.

It is an arithmetic number, because the mean of its divisors is an integer number (142450140).

Almost surely, 2^1121213309 is an apocalyptic number.

It is an amenable number.

1121213309 is a deficient number, since it is larger than the sum of its proper divisors (18387811).

1121213309 is an equidigital number, since it uses as much as digits as its factorization.

1121213309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24379.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 1121213309 is about 33484.5234250094. The cubic root of 1121213309 is about 1038.8736909776.

The spelling of 1121213309 in words is "one billion, one hundred twenty-one million, two hundred thirteen thousand, three hundred nine".