11111021211 has 32 divisors (see below), whose sum is σ = 15863040000. Its totient is φ = 6893196800.

The previous prime is 11111021189. The next prime is 11111021219. The reversal of 11111021211 is 11212011111.

11111021211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11111021211 - 2¹⁰ = 11111020187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11111021219) 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 31 ways as a sum of consecutive naturals, for example, 7411540 + ... + 7413038.

It is an arithmetic number, because the mean of its divisors is an integer number (495720000).

Almost surely, 2^11111021211 is an apocalyptic number.

11111021211 is a deficient number, since it is larger than the sum of its proper divisors (4752018789).

11111021211 is a wasteful number, since it uses less digits than its factorization.

11111021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3059.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 11111021211 its reverse (11212011111), we get a palindrome (22323032322).

The spelling of 11111021211 in words is "eleven billion, one hundred eleven million, twenty-one thousand, two hundred eleven".