11111103322221 has 16 divisors (see below), whose sum is σ = 16933180281984. Its totient is φ = 6348461191104.

The previous prime is 11111103322183. The next prime is 11111103322223. The reversal of 11111103322221 is 12222330111111.

It is not a de Polignac number, because 11111103322221 - 2¹⁹ = 11111102797933 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111103322223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30678486 + ... + 31038551.

It is an arithmetic number, because the mean of its divisors is an integer number (1058323767624).

Almost surely, 2^{11111103322221} is an apocalyptic number.

It is an amenable number.

11111103322221 is a deficient number, since it is larger than the sum of its proper divisors (5822076959763).

11111103322221 is an equidigital number, since it uses as much as digits as its factorization.

11111103322221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61725620.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 11111103322221 its reverse (12222330111111), we get a palindrome (23333433433332).

The spelling of 11111103322221 in words is "eleven trillion, one hundred eleven billion, one hundred three million, three hundred twenty-two thousand, two hundred twenty-one".