11102100221 has 4 divisors (see below), whose sum is σ = 11115333600. Its totient is φ = 11088866844.

The previous prime is 11102100203. The next prime is 11102100287. The reversal of 11102100221 is 12200120111.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12200120111 = 58613 ⋅208147.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11102100221 is a prime.

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 (11152100221) 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, 6615431 + ... + 6617108.

It is an arithmetic number, because the mean of its divisors is an integer number (2778833400).

Almost surely, 2^11102100221 is an apocalyptic number.

It is an amenable number.

11102100221 is a deficient number, since it is larger than the sum of its proper divisors (13233379).

11102100221 is an equidigital number, since it uses as much as digits as its factorization.

11102100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13233378.

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

Adding to 11102100221 its reverse (12200120111), we get a palindrome (23302220332).

The spelling of 11102100221 in words is "eleven billion, one hundred two million, one hundred thousand, two hundred twenty-one".