11220312001 has 12 divisors (see below), whose sum is σ = 12114569980. Its totient is φ = 10387157760.

The previous prime is 11220311987. The next prime is 11220312007. The reversal of 11220312001 is 10021302211.

11220312001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 1335975601 + 9884336400 = 36551^2 + 99420^2 .

It is not a de Polignac number, because 11220312001 - 2⁷ = 11220311873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11220312007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 300606 + ... + 335863.

Almost surely, 2^11220312001 is an apocalyptic number.

It is an amenable number.

11220312001 is a deficient number, since it is larger than the sum of its proper divisors (894257979).

11220312001 is an equidigital number, since it uses as much as digits as its factorization.

11220312001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636564 (or 636547 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 11220312001 its reverse (10021302211), we get a palindrome (21241614212).

The spelling of 11220312001 in words is "eleven billion, two hundred twenty million, three hundred twelve thousand, one".