11210121220111 has 16 divisors (see below), whose sum is σ = 12399562506240. Its totient is φ = 10049393558880.

The previous prime is 11210121220087. The next prime is 11210121220127. The reversal of 11210121220111 is 11102212101211.

It is a cyclic number.

It is not a de Polignac number, because 11210121220111 - 2²¹ = 11210119122959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11210121227111) 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, 7400271 + ... + 8785456.

It is an arithmetic number, because the mean of its divisors is an integer number (774972656640).

Almost surely, 2^{11210121220111} is an apocalyptic number.

11210121220111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11210121220111 is a deficient number, since it is larger than the sum of its proper divisors (1189441286129).

11210121220111 is a wasteful number, since it uses less digits than its factorization.

11210121220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16186614.

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

Adding to 11210121220111 its reverse (11102212101211), we get a palindrome (22312333321322).

The spelling of 11210121220111 in words is "eleven trillion, two hundred ten billion, one hundred twenty-one million, two hundred twenty thousand, one hundred eleven".