11102120221 has 4 divisors (see below), whose sum is σ = 11170231552. Its totient is φ = 11034008892.

The previous prime is 11102120207. The next prime is 11102120243. The reversal of 11102120221 is 12202120111.

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 11102120221 - 2⁹ = 11102119709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11102120021) 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, 34055421 + ... + 34055746.

It is an arithmetic number, because the mean of its divisors is an integer number (2792557888).

Almost surely, 2^11102120221 is an apocalyptic number.

It is an amenable number.

11102120221 is a deficient number, since it is larger than the sum of its proper divisors (68111331).

11102120221 is an equidigital number, since it uses as much as digits as its factorization.

11102120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68111330.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11102120221 its reverse (12202120111), we get a palindrome (23304240332).

The spelling of 11102120221 in words is "eleven billion, one hundred two million, one hundred twenty thousand, two hundred twenty-one".