21022323211 has 8 divisors (see below), whose sum is σ = 21112336080. Its totient is φ = 20932374528.

The previous prime is 21022323193. The next prime is 21022323239. The reversal of 21022323211 is 11232322012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21022323211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21022323241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 709975 + ... + 738991.

It is an arithmetic number, because the mean of its divisors is an integer number (2639042010).

Almost surely, 2^21022323211 is an apocalyptic number.

21022323211 is a deficient number, since it is larger than the sum of its proper divisors (90012869).

21022323211 is a wasteful number, since it uses less digits than its factorization.

21022323211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32093.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21022323211 its reverse (11232322012), we get a palindrome (32254645223).

The spelling of 21022323211 in words is "twenty-one billion, twenty-two million, three hundred twenty-three thousand, two hundred eleven".