11101220120111 has 4 divisors (see below), whose sum is σ = 12110421949224. Its totient is φ = 10092018291000.

The previous prime is 11101220120099. The next prime is 11101220120117. The reversal of 11101220120111 is 11102102210111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11101220120111 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 (11101220120117) 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, 504600914540 + ... + 504600914561.

It is an arithmetic number, because the mean of its divisors is an integer number (3027605487306).

Almost surely, 2^{11101220120111} is an apocalyptic number.

11101220120111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11101220120111 is a deficient number, since it is larger than the sum of its proper divisors (1009201829113).

11101220120111 is a wasteful number, since it uses less digits than its factorization.

11101220120111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009201829112.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 11101220120111 its reverse (11102102210111), we get a palindrome (22203322330222).

Subtracting 11101220120111 from its reverse (11102102210111), we obtain a square (882090000 = 29700²).

The spelling of 11101220120111 in words is "eleven trillion, one hundred one billion, two hundred twenty million, one hundred twenty thousand, one hundred eleven".