2211103220221 has 4 divisors (see below), whose sum is σ = 2526975108832. Its totient is φ = 1895231331612.

The previous prime is 2211103220149. The next prime is 2211103220231. The reversal of 2211103220221 is 1220223011122.

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 2211103220221 - 2²⁷ = 2210969002493 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 (2211103220231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157935944295 + ... + 157935944308.

It is an arithmetic number, because the mean of its divisors is an integer number (631743777208).

Almost surely, 2^{2211103220221} is an apocalyptic number.

It is an amenable number.

2211103220221 is a deficient number, since it is larger than the sum of its proper divisors (315871888611).

2211103220221 is an equidigital number, since it uses as much as digits as its factorization.

2211103220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315871888610.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 2211103220221 its reverse (1220223011122), we get a palindrome (3431326231343).

The spelling of 2211103220221 in words is "two trillion, two hundred eleven billion, one hundred three million, two hundred twenty thousand, two hundred twenty-one".