11211001011 has 18 divisors (see below), whose sum is σ = 18837533052. Its totient is φ = 6406286040.

The previous prime is 11211001007. The next prime is 11211001049. The reversal of 11211001011 is 11010011211.

11211001011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11211001011 - 2² = 11211001007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 11211000984 and 11211001002.

It is not an unprimeable number, because it can be changed into a prime (11211001411) 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 17 ways as a sum of consecutive naturals, for example, 12710445 + ... + 12711326.

It is an arithmetic number, because the mean of its divisors is an integer number (1046529614).

Almost surely, 2^11211001011 is an apocalyptic number.

11211001011 is a deficient number, since it is larger than the sum of its proper divisors (7626532041).

11211001011 is a wasteful number, since it uses less digits than its factorization.

11211001011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25421791 (or 25421781 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 11211001011 its reverse (11010011211), we get a palindrome (22221012222).

The spelling of 11211001011 in words is "eleven billion, two hundred eleven million, one thousand, eleven".