1220021201 has 16 divisors (see below), whose sum is σ = 1483355520. Its totient is φ = 979534080.

The previous prime is 1220021191. The next prime is 1220021203. The reversal of 1220021201 is 1021200221.

It is a happy number.

It is not a de Polignac number, because 1220021201 - 2⁶ = 1220021137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220021203) 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 15 ways as a sum of consecutive naturals, for example, 815 + ... + 49403.

It is an arithmetic number, because the mean of its divisors is an integer number (92709720).

Almost surely, 2^1220021201 is an apocalyptic number.

It is an amenable number.

1220021201 is a deficient number, since it is larger than the sum of its proper divisors (263334319).

1220021201 is a wasteful number, since it uses less digits than its factorization.

1220021201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48824.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1220021201 is about 34928.8018832596. The cubic root of 1220021201 is about 1068.5359197029.

Adding to 1220021201 its reverse (1021200221), we get a palindrome (2241221422).

The spelling of 1220021201 in words is "one billion, two hundred twenty million, twenty-one thousand, two hundred one".