20111101110221 has 4 divisors (see below), whose sum is σ = 21939383029344. Its totient is φ = 18282819191100.

The previous prime is 20111101110209. The next prime is 20111101110227. The reversal of 20111101110221 is 12201110111102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20111101110221 is a prime.

It is a super-3 number, since 3×20111101110221³ (a number of 41 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20111101110196 and 20111101110205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111101110227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 914140959545 + ... + 914140959566.

It is an arithmetic number, because the mean of its divisors is an integer number (5484845757336).

Almost surely, 2^{20111101110221} is an apocalyptic number.

It is an amenable number.

20111101110221 is a deficient number, since it is larger than the sum of its proper divisors (1828281919123).

20111101110221 is a wasteful number, since it uses less digits than its factorization.

20111101110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828281919122.

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

Adding to 20111101110221 its reverse (12201110111102), we get a palindrome (32312211221323).

The spelling of 20111101110221 in words is "twenty trillion, one hundred eleven billion, one hundred one million, one hundred ten thousand, two hundred twenty-one".