1223111201 has 4 divisors (see below), whose sum is σ = 1317196692. Its totient is φ = 1129025712.

The previous prime is 1223111191. The next prime is 1223111233. The reversal of 1223111201 is 1021113221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 568774801 + 654336400 = 23849^2 + 25580^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223111201 - 2⁶ = 1223111137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223111261) 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 3 ways as a sum of consecutive naturals, for example, 47042726 + ... + 47042751.

It is an arithmetic number, because the mean of its divisors is an integer number (329299173).

Almost surely, 2^1223111201 is an apocalyptic number.

It is an amenable number.

1223111201 is a deficient number, since it is larger than the sum of its proper divisors (94085491).

1223111201 is an equidigital number, since it uses as much as digits as its factorization.

1223111201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94085490.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1223111201 is about 34973.0067480621. The cubic root of 1223111201 is about 1069.4372680806.

Adding to 1223111201 its reverse (1021113221), we get a palindrome (2244224422).

It can be divided in two parts, 12231 and 11201, that added together give a palindrome (23432).

The spelling of 1223111201 in words is "one billion, two hundred twenty-three million, one hundred eleven thousand, two hundred one".