11111120210221 has 4 divisors (see below), whose sum is σ = 11111846110432. Its totient is φ = 11110394310012.

The previous prime is 11111120210213. The next prime is 11111120210231. The reversal of 11111120210221 is 12201202111111.

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 not a de Polignac number, because 11111120210221 - 2³ = 11111120210213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11111120210195 and 11111120210204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111120210231) 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, 362927145 + ... + 362957758.

It is an arithmetic number, because the mean of its divisors is an integer number (2777961527608).

Almost surely, 2^{11111120210221} is an apocalyptic number.

It is an amenable number.

11111120210221 is a deficient number, since it is larger than the sum of its proper divisors (725900211).

11111120210221 is an equidigital number, since it uses as much as digits as its factorization.

11111120210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725900210.

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

Adding to 11111120210221 its reverse (12201202111111), we get a palindrome (23312322321332).

The spelling of 11111120210221 in words is "eleven trillion, one hundred eleven billion, one hundred twenty million, two hundred ten thousand, two hundred twenty-one".