11110020221 has 4 divisors (see below), whose sum is σ = 11139806172. Its totient is φ = 11080234272.

The previous prime is 11110020197. The next prime is 11110020239. The reversal of 11110020221 is 12202001111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12202001111 = 29 ⋅420758659.

It can be written as a sum of positive squares in 2 ways, for example, as 3961317721 + 7148702500 = 62939^2 + 84550^2 .

It is a cyclic number.

It is not a de Polignac number, because 11110020221 - 2¹⁴ = 11110003837 is a prime.

It is a super-2 number, since 2×11110020221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11110020241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14892416 + ... + 14893161.

It is an arithmetic number, because the mean of its divisors is an integer number (2784951543).

Almost surely, 2^11110020221 is an apocalyptic number.

It is an amenable number.

11110020221 is a deficient number, since it is larger than the sum of its proper divisors (29785951).

11110020221 is an equidigital number, since it uses as much as digits as its factorization.

11110020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29785950.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 11110020221 its reverse (12202001111), we get a palindrome (23312021332).

The spelling of 11110020221 in words is "eleven billion, one hundred ten million, twenty thousand, two hundred twenty-one".