21344121222 has 16 divisors (see below), whose sum is σ = 42695856432. Its totient is φ = 7113438080.

The previous prime is 21344121167. The next prime is 21344121263. The reversal of 21344121222 is 22212144312.

It is a junction number, because it is equal to n+sod(n) for n = 21344121192 and 21344121201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280479 + ... + 348362.

It is an arithmetic number, because the mean of its divisors is an integer number (2668491027).

Almost surely, 2^21344121222 is an apocalyptic number.

21344121222 is an abundant number, since it is smaller than the sum of its proper divisors (21351735210).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21344121222 is a wasteful number, since it uses less digits than its factorization.

21344121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634503.

The product of its digits is 1536, while the sum is 24.

Adding to 21344121222 its reverse (22212144312), we get a palindrome (43556265534).

The spelling of 21344121222 in words is "twenty-one billion, three hundred forty-four million, one hundred twenty-one thousand, two hundred twenty-two".