21232212211 has 8 divisors (see below), whose sum is σ = 24829697024. Its totient is φ = 17775805320.

The previous prime is 21232212191. The next prime is 21232212229. The reversal of 21232212211 is 11221223212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21232212211 - 2¹⁵ = 21232179443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21232212011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35269155 + ... + 35269756.

It is an arithmetic number, because the mean of its divisors is an integer number (3103712128).

Almost surely, 2^21232212211 is an apocalyptic number.

21232212211 is a deficient number, since it is larger than the sum of its proper divisors (3597484813).

21232212211 is an equidigital number, since it uses as much as digits as its factorization.

21232212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70538961.

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

Adding to 21232212211 its reverse (11221223212), we get a palindrome (32453435423).

It can be divided in two parts, 21 and 232212211, that added together give a palindrome (232212232).

The spelling of 21232212211 in words is "twenty-one billion, two hundred thirty-two million, two hundred twelve thousand, two hundred eleven".