21001323133222 has 16 divisors (see below), whose sum is σ = 32588653581360. Its totient is φ = 10138447351648.

The previous prime is 21001323133207. The next prime is 21001323133229. The reversal of 21001323133222 is 22233132310012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001323133229) 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, 2753193 + ... + 7041499.

It is an arithmetic number, because the mean of its divisors is an integer number (2036790848835).

Almost surely, 2^{21001323133222} is an apocalyptic number.

21001323133222 is a deficient number, since it is larger than the sum of its proper divisors (11587330448138).

21001323133222 is a wasteful number, since it uses less digits than its factorization.

21001323133222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4372775.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21001323133222 its reverse (22233132310012), we get a palindrome (43234455443234).

The spelling of 21001323133222 in words is "twenty-one trillion, one billion, three hundred twenty-three million, one hundred thirty-three thousand, two hundred twenty-two".