21224011333 has 16 divisors (see below), whose sum is σ = 24884770176. Its totient is φ = 17721768960.

The previous prime is 21224011307. The next prime is 21224011343. The reversal of 21224011333 is 33311042212.

It is a de Polignac number, because none of the positive numbers 2^k-21224011333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21224011343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138210 + ... + 248092.

It is an arithmetic number, because the mean of its divisors is an integer number (1555298136).

Almost surely, 2^21224011333 is an apocalyptic number.

It is an amenable number.

21224011333 is a deficient number, since it is larger than the sum of its proper divisors (3660758843).

21224011333 is a wasteful number, since it uses less digits than its factorization.

21224011333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110604.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21224011333 its reverse (33311042212), we get a palindrome (54535053545).

The spelling of 21224011333 in words is "twenty-one billion, two hundred twenty-four million, eleven thousand, three hundred thirty-three".