22121310320 has 20 divisors (see below), whose sum is σ = 51432046680. Its totient is φ = 8848524096.

The previous prime is 22121310307. The next prime is 22121310331. The reversal of 22121310320 is 2301312122.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138258110 + ... + 138258269.

It is an arithmetic number, because the mean of its divisors is an integer number (2571602334).

Almost surely, 2^22121310320 is an apocalyptic number.

22121310320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121310320 is an abundant number, since it is smaller than the sum of its proper divisors (29310736360).

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

22121310320 is a wasteful number, since it uses less digits than its factorization.

22121310320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276516392 (or 276516386 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 22121310320 its reverse (2301312122), we get a palindrome (24422622442).

The spelling of 22121310320 in words is "twenty-two billion, one hundred twenty-one million, three hundred ten thousand, three hundred twenty".