1220045201 has 6 divisors (see below), whose sum is σ = 1240377606. Its totient is φ = 1200040800.

The previous prime is 1220045179. The next prime is 1220045237. The reversal of 1220045201 is 1025400221.

It can be written as a sum of positive squares in 3 ways, for example, as 237160000 + 982885201 = 15400^2 + 31351^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1220045201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220045201.

It is not an unprimeable number, because it can be changed into a prime (1220045251) 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 5 ways as a sum of consecutive naturals, for example, 160220 + ... + 167661.

It is an arithmetic number, because the mean of its divisors is an integer number (206729601).

Almost surely, 2^1220045201 is an apocalyptic number.

It is an amenable number.

1220045201 is a deficient number, since it is larger than the sum of its proper divisors (20332405).

1220045201 is an frugal number, since it uses more digits than its factorization.

1220045201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328003 (or 327942 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 1220045201 is about 34929.1454375855. The cubic root of 1220045201 is about 1068.5429263281.

Adding to 1220045201 its reverse (1025400221), we get a palindrome (2245445422).

The spelling of 1220045201 in words is "one billion, two hundred twenty million, forty-five thousand, two hundred one".