21223103211 has 12 divisors (see below), whose sum is σ = 30671643288. Its totient is φ = 14141327904.

The previous prime is 21223103203. The next prime is 21223103233. The reversal of 21223103211 is 11230132212.

It is not a de Polignac number, because 21223103211 - 2³ = 21223103203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21223103201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 599125 + ... + 633558.

It is an arithmetic number, because the mean of its divisors is an integer number (2555970274).

Almost surely, 2^21223103211 is an apocalyptic number.

21223103211 is a deficient number, since it is larger than the sum of its proper divisors (9448540077).

21223103211 is a wasteful number, since it uses less digits than its factorization.

21223103211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234602 (or 1234599 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21223103211 its reverse (11230132212), we get a palindrome (32453235423).

The spelling of 21223103211 in words is "twenty-one billion, two hundred twenty-three million, one hundred three thousand, two hundred eleven".