1210221201 has 16 divisors (see below), whose sum is σ = 1871673344. Its totient is φ = 681232464.

The previous prime is 1210221191. The next prime is 1210221203. The reversal of 1210221201 is 1021220121.

It is not a de Polignac number, because 1210221201 - 2¹³ = 1210213009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1210221203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 428665 + ... + 431478.

It is an arithmetic number, because the mean of its divisors is an integer number (116979584).

Almost surely, 2^1210221201 is an apocalyptic number.

It is an amenable number.

1210221201 is a deficient number, since it is larger than the sum of its proper divisors (661452143).

1210221201 is an equidigital number, since it uses as much as digits as its factorization.

1210221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860220.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1210221201 is about 34788.2336573733. The cubic root of 1210221201 is about 1065.6671673226.

Adding to 1210221201 its reverse (1021220121), we get a palindrome (2231441322).

The spelling of 1210221201 in words is "one billion, two hundred ten million, two hundred twenty-one thousand, two hundred one".