11111121210211 has 16 divisors (see below), whose sum is σ = 12759685286400. Its totient is φ = 9569009412000.

The previous prime is 11111121210209. The next prime is 11111121210239. The reversal of 11111121210211 is 11201212111111.

It is a cyclic number.

It is not a de Polignac number, because 11111121210211 - 2¹ = 11111121210209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11111121250211) 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, 4331761 + ... + 6402061.

It is an arithmetic number, because the mean of its divisors is an integer number (797480330400).

Almost surely, 2^{11111121210211} is an apocalyptic number.

11111121210211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11111121210211 is a deficient number, since it is larger than the sum of its proper divisors (1648564076189).

11111121210211 is a wasteful number, since it uses less digits than its factorization.

11111121210211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2096010.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 11111121210211 its reverse (11201212111111), we get a palindrome (22312333321322).

The spelling of 11111121210211 in words is "eleven trillion, one hundred eleven billion, one hundred twenty-one million, two hundred ten thousand, two hundred eleven".