21224352336211 has 4 divisors (see below), whose sum is σ = 21224375707000. Its totient is φ = 21224328965424.

The previous prime is 21224352336169. The next prime is 21224352336221. The reversal of 21224352336211 is 11263325342212.

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 21224352336211 - 2¹⁵ = 21224352303443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21224352336221) 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, 10265661 + ... + 12158638.

It is an arithmetic number, because the mean of its divisors is an integer number (5306093926750).

Almost surely, 2^{21224352336211} is an apocalyptic number.

21224352336211 is a deficient number, since it is larger than the sum of its proper divisors (23370789).

21224352336211 is an equidigital number, since it uses as much as digits as its factorization.

21224352336211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23370788.

The product of its digits is 103680, while the sum is 37.

Adding to 21224352336211 its reverse (11263325342212), we get a palindrome (32487677678423).

The spelling of 21224352336211 in words is "twenty-one trillion, two hundred twenty-four billion, three hundred fifty-two million, three hundred thirty-six thousand, two hundred eleven".