21320323231222 has 16 divisors (see below), whose sum is σ = 32026731328800. Its totient is φ = 10644746716800.

The previous prime is 21320323231183. The next prime is 21320323231243. The reversal of 21320323231222 is 22213232302312.

It is a super-2 number, since 2×21320323231222² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92148679 + ... + 92379757.

It is an arithmetic number, because the mean of its divisors is an integer number (2001670708050).

Almost surely, 2^{21320323231222} is an apocalyptic number.

21320323231222 is a deficient number, since it is larger than the sum of its proper divisors (10706408097578).

21320323231222 is a wasteful number, since it uses less digits than its factorization.

21320323231222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297591.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 21320323231222 its reverse (22213232302312), we get a palindrome (43533555533534).

The spelling of 21320323231222 in words is "twenty-one trillion, three hundred twenty billion, three hundred twenty-three million, two hundred thirty-one thousand, two hundred twenty-two".