1220323201 has 2 divisors, whose sum is σ = 1220323202. Its totient is φ = 1220323200.

The previous prime is 1220323151. The next prime is 1220323229. The reversal of 1220323201 is 1023230221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1197090801 + 23232400 = 34599^2 + 4820^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220323201 - 2¹⁵ = 1220290433 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220323231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610161600 + 610161601.

It is an arithmetic number, because the mean of its divisors is an integer number (610161601).

Almost surely, 2^1220323201 is an apocalyptic number.

It is an amenable number.

1220323201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220323201 is an equidigital number, since it uses as much as digits as its factorization.

1220323201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1220323201 is about 34933.1246956238. The cubic root of 1220323201 is about 1068.6240797077.

Adding to 1220323201 its reverse (1023230221), we get a palindrome (2243553422).

The spelling of 1220323201 in words is "one billion, two hundred twenty million, three hundred twenty-three thousand, two hundred one".