1220116201 has 2 divisors, whose sum is σ = 1220116202. Its totient is φ = 1220116200.

The previous prime is 1220116189. The next prime is 1220116207. The reversal of 1220116201 is 1026110221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1058851600 + 161264601 = 32540^2 + 12699^2 .

It is an emirp because it is prime and its reverse (1026110221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1220116201 - 2¹⁵ = 1220083433 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220116207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610058100 + 610058101.

It is an arithmetic number, because the mean of its divisors is an integer number (610058101).

Almost surely, 2^1220116201 is an apocalyptic number.

It is an amenable number.

1220116201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220116201 is an equidigital number, since it uses as much as digits as its factorization.

1220116201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1220116201 is about 34930.1617660153. The cubic root of 1220116201 is about 1068.5636537230.

Adding to 1220116201 its reverse (1026110221), we get a palindrome (2246226422).

The spelling of 1220116201 in words is "one billion, two hundred twenty million, one hundred sixteen thousand, two hundred one".