1220127201 has 6 divisors (see below), whose sum is σ = 1762405970. Its totient is φ = 813418128.

The previous prime is 1220127169. The next prime is 1220127211. The reversal of 1220127201 is 1027210221.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1219406400 + 720801 = 34920^2 + 849^2 .

It is not a de Polignac number, because 1220127201 - 2⁵ = 1220127169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220127211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67784836 + ... + 67784853.

Almost surely, 2^1220127201 is an apocalyptic number.

It is an amenable number.

1220127201 is a deficient number, since it is larger than the sum of its proper divisors (542278769).

1220127201 is a wasteful number, since it uses less digits than its factorization.

1220127201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135569695 (or 135569692 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 1220127201 is about 34930.3192227039. The cubic root of 1220127201 is about 1068.5668649376.

Adding to 1220127201 its reverse (1027210221), we get a palindrome (2247337422).

The spelling of 1220127201 in words is "one billion, two hundred twenty million, one hundred twenty-seven thousand, two hundred one".