1213322005 has 24 divisors (see below), whose sum is σ = 1677126528. Its totient is φ = 825472128.

The previous prime is 1213322003. The next prime is 1213322009. The reversal of 1213322005 is 5002233121.

It is not a de Polignac number, because 1213322005 - 2¹ = 1213322003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213322003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 655992 + ... + 657838.

It is an arithmetic number, because the mean of its divisors is an integer number (69880272).

Almost surely, 2^1213322005 is an apocalyptic number.

It is an amenable number.

1213322005 is a deficient number, since it is larger than the sum of its proper divisors (463804523).

1213322005 is an equidigital number, since it uses as much as digits as its factorization.

1213322005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2133 (or 1996 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 1213322005 is about 34832.7719970720. The cubic root of 1213322005 is about 1066.5765346476.

Adding to 1213322005 its reverse (5002233121), we get a palindrome (6215555126).

The spelling of 1213322005 in words is "one billion, two hundred thirteen million, three hundred twenty-two thousand, five".