11211000001 has 4 divisors (see below), whose sum is σ = 11212561492. Its totient is φ = 11209438512.

The previous prime is 11210999993. The next prime is 11211000011. The reversal of 11211000001 is 10000011211.

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 5484143025 + 5726856976 = 74055^2 + 75676^2 .

It is a cyclic number.

It is not a de Polignac number, because 11211000001 - 2³ = 11210999993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11211000011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 769926 + ... + 784351.

It is an arithmetic number, because the mean of its divisors is an integer number (2803140373).

Almost surely, 2^11211000001 is an apocalyptic number.

It is an amenable number.

11211000001 is a deficient number, since it is larger than the sum of its proper divisors (1561491).

11211000001 is an equidigital number, since it uses as much as digits as its factorization.

11211000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561490.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 11211000001 its reverse (10000011211), we get a palindrome (21211011212).

The spelling of 11211000001 in words is "eleven billion, two hundred eleven million, one", and thus it is an aban number.