21022132211 has 4 divisors (see below), whose sum is σ = 21029416752. Its totient is φ = 21014847672.

The previous prime is 21022132193. The next prime is 21022132231. The reversal of 21022132211 is 11223122012.

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 21022132211 - 2⁶ = 21022132147 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21022132211.

It is not an unprimeable number, because it can be changed into a prime (21022132231) 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, 3637940 + ... + 3643713.

It is an arithmetic number, because the mean of its divisors is an integer number (5257354188).

Almost surely, 2^21022132211 is an apocalyptic number.

21022132211 is a deficient number, since it is larger than the sum of its proper divisors (7284541).

21022132211 is an equidigital number, since it uses as much as digits as its factorization.

21022132211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7284540.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21022132211 its reverse (11223122012), we get a palindrome (32245254223).

The spelling of 21022132211 in words is "twenty-one billion, twenty-two million, one hundred thirty-two thousand, two hundred eleven".