11221211012111 has 16 divisors (see below), whose sum is σ = 12326851434240. Its totient is φ = 10167187662720.

The previous prime is 11221211012101. The next prime is 11221211012113. The reversal of 11221211012111 is 11121011212211.

It is a cyclic number.

It is not a de Polignac number, because 11221211012111 - 2³⁸ = 10946333105167 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11221211012111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221211012113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2063396 + ... + 5167206.

It is an arithmetic number, because the mean of its divisors is an integer number (770428214640).

Almost surely, 2^{11221211012111} is an apocalyptic number.

11221211012111 is a deficient number, since it is larger than the sum of its proper divisors (1105640422129).

11221211012111 is a wasteful number, since it uses less digits than its factorization.

11221211012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3112126.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 11221211012111 its reverse (11121011212211), we get a palindrome (22342222224322).

The spelling of 11221211012111 in words is "eleven trillion, two hundred twenty-one billion, two hundred eleven million, twelve thousand, one hundred eleven".