1172220205 has 64 divisors (see below), whose sum is σ = 1629315072. Its totient is φ = 803416320.

The previous prime is 1172220173. The next prime is 1172220209. The reversal of 1172220205 is 5020222711.

It is not a de Polignac number, because 1172220205 - 2⁵ = 1172220173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1172220209) 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 63 ways as a sum of consecutive naturals, for example, 7191454 + ... + 7191616.

It is an arithmetic number, because the mean of its divisors is an integer number (25458048).

Almost surely, 2^1172220205 is an apocalyptic number.

It is an amenable number.

1172220205 is a deficient number, since it is larger than the sum of its proper divisors (457094867).

1172220205 is a wasteful number, since it uses less digits than its factorization.

1172220205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 1172220205 is about 34237.7015145585. The cubic root of 1172220205 is about 1054.3943440143.

Adding to 1172220205 its reverse (5020222711), we get a palindrome (6192442916).

The spelling of 1172220205 in words is "one billion, one hundred seventy-two million, two hundred twenty thousand, two hundred five".