11102121220111 has 4 divisors (see below), whose sum is σ = 11137591256272. Its totient is φ = 11066651183952.

The previous prime is 11102121220109. The next prime is 11102121220121. The reversal of 11102121220111 is 11102212120111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11102121220111 - 2¹ = 11102121220109 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 (11102121220121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17735017611 + ... + 17735018236.

It is an arithmetic number, because the mean of its divisors is an integer number (2784397814068).

Almost surely, 2^{11102121220111} is an apocalyptic number.

11102121220111 is a deficient number, since it is larger than the sum of its proper divisors (35470036161).

11102121220111 is an equidigital number, since it uses as much as digits as its factorization.

11102121220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35470036160.

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

Adding to 11102121220111 its reverse (11102212120111), we get a palindrome (22204333340222).

The spelling of 11102121220111 in words is "eleven trillion, one hundred two billion, one hundred twenty-one million, two hundred twenty thousand, one hundred eleven".