21103221322211 has 4 divisors (see below), whose sum is σ = 24117967225392. Its totient is φ = 18088475419032.

The previous prime is 21103221322171. The next prime is 21103221322229. The reversal of 21103221322211 is 11222312230112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21103221322211 - 2³⁸ = 20828343415267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21103221322511) 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, 1507372951580 + ... + 1507372951593.

It is an arithmetic number, because the mean of its divisors is an integer number (6029491806348).

Almost surely, 2^{21103221322211} is an apocalyptic number.

21103221322211 is a deficient number, since it is larger than the sum of its proper divisors (3014745903181).

21103221322211 is an equidigital number, since it uses as much as digits as its factorization.

21103221322211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3014745903180.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 21103221322211 its reverse (11222312230112), we get a palindrome (32325533552323).

The spelling of 21103221322211 in words is "twenty-one trillion, one hundred three billion, two hundred twenty-one million, three hundred twenty-two thousand, two hundred eleven".