1122312009 has 32 divisors (see below), whose sum is σ = 1891536640. Its totient is φ = 575983872.

The previous prime is 1122311987. The next prime is 1122312049. The reversal of 1122312009 is 9002132211.

It is not a de Polignac number, because 1122312009 - 2⁷ = 1122311881 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1122312049) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45454 + ... + 65655.

It is an arithmetic number, because the mean of its divisors is an integer number (59110520).

Almost surely, 2^1122312009 is an apocalyptic number.

It is an amenable number.

1122312009 is a deficient number, since it is larger than the sum of its proper divisors (769224631).

1122312009 is a wasteful number, since it uses less digits than its factorization.

1122312009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111169.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 1122312009 is about 33500.9254946785. The cubic root of 1122312009 is about 1039.2129181010.

It can be divided in two parts, 11223 and 12009, that added together give a palindrome (23232).

The spelling of 1122312009 in words is "one billion, one hundred twenty-two million, three hundred twelve thousand, nine".