11211211001 has 2 divisors, whose sum is σ = 11211211002. Its totient is φ = 11211211000.

The previous prime is 11211210979. The next prime is 11211211013. The reversal of 11211211001 is 10011211211.

11211211001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6644695225 + 4566515776 = 81515^2 + 67576^2 .

It is a cyclic number.

It is not a de Polignac number, because 11211211001 - 2²² = 11207016697 is a prime.

It is not a weakly prime, because it can be changed into another prime (11211211021) 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 as a sum of consecutive naturals, namely, 5605605500 + 5605605501.

It is an arithmetic number, because the mean of its divisors is an integer number (5605605501).

Almost surely, 2^11211211001 is an apocalyptic number.

It is an amenable number.

11211211001 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211211001 is an equidigital number, since it uses as much as digits as its factorization.

11211211001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 11211211001 its reverse (10011211211), we get a palindrome (21222422212).

The spelling of 11211211001 in words is "eleven billion, two hundred eleven million, two hundred eleven thousand, one".