11100220212221 has 4 divisors (see below), whose sum is σ = 12685965956832. Its totient is φ = 9514474467612.

The previous prime is 11100220212217. The next prime is 11100220212223. The reversal of 11100220212221 is 12221202200111.

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 11100220212221 - 2² = 11100220212217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11100220212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100220212223) 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, 792872872295 + ... + 792872872308.

It is an arithmetic number, because the mean of its divisors is an integer number (3171491489208).

Almost surely, 2^{11100220212221} is an apocalyptic number.

It is an amenable number.

11100220212221 is a deficient number, since it is larger than the sum of its proper divisors (1585745744611).

11100220212221 is an equidigital number, since it uses as much as digits as its factorization.

11100220212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1585745744610.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 11100220212221 its reverse (12221202200111), we get a palindrome (23321422412332).

The spelling of 11100220212221 in words is "eleven trillion, one hundred billion, two hundred twenty million, two hundred twelve thousand, two hundred twenty-one".