11110021220221 has 32 divisors (see below), whose sum is σ = 15438154245120. Its totient is φ = 7719077088000.

The previous prime is 11110021220189. The next prime is 11110021220251. The reversal of 11110021220221 is 12202212001111.

It is a cyclic number.

It is not a de Polignac number, because 11110021220221 - 2⁵ = 11110021220189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11110021220195 and 11110021220204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11110021220251) 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 31 ways as a sum of consecutive naturals, for example, 223328055 + ... + 223377796.

It is an arithmetic number, because the mean of its divisors is an integer number (482442320160).

Almost surely, 2^{11110021220221} is an apocalyptic number.

11110021220221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11110021220221 is a deficient number, since it is larger than the sum of its proper divisors (4328133024899).

11110021220221 is a wasteful number, since it uses less digits than its factorization.

11110021220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446705905.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11110021220221 its reverse (12202212001111), we get a palindrome (23312233221332).

The spelling of 11110021220221 in words is "eleven trillion, one hundred ten billion, twenty-one million, two hundred twenty thousand, two hundred twenty-one".