11031220001 has 2 divisors, whose sum is σ = 11031220002. Its totient is φ = 11031220000.

The previous prime is 11031219971. The next prime is 11031220037. The reversal of 11031220001 is 10002213011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6756675601 + 4274544400 = 82199^2 + 65380^2 .

It is a cyclic number.

It is not a de Polignac number, because 11031220001 - 2¹⁰ = 11031218977 is a prime.

It is not a weakly prime, because it can be changed into another prime (11031220061) 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 as a sum of consecutive naturals, namely, 5515610000 + 5515610001.

It is an arithmetic number, because the mean of its divisors is an integer number (5515610001).

Almost surely, 2^11031220001 is an apocalyptic number.

It is an amenable number.

11031220001 is a deficient number, since it is larger than the sum of its proper divisors (1).

11031220001 is an equidigital number, since it uses as much as digits as its factorization.

11031220001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 11031220001 its reverse (10002213011), we get a palindrome (21033433012).

The spelling of 11031220001 in words is "eleven billion, thirty-one million, two hundred twenty thousand, one".