21222430065456 has 40 divisors (see below), whose sum is σ = 57208289744640. Its totient is φ = 6766571904576.

The previous prime is 21222430065373. The next prime is 21222430065467. The reversal of 21222430065456 is 65456003422212.

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, 9611606716 + ... + 9611608923.

It is an arithmetic number, because the mean of its divisors is an integer number (1430207243616).

Almost surely, 2^{21222430065456} is an apocalyptic number.

It is an amenable number.

21222430065456 is an abundant number, since it is smaller than the sum of its proper divisors (35985859679184).

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

21222430065456 is a wasteful number, since it uses less digits than its factorization.

21222430065456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19223215673 (or 19223215667 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 42.

Adding to 21222430065456 its reverse (65456003422212), we get a palindrome (86678433487668).

The spelling of 21222430065456 in words is "twenty-one trillion, two hundred twenty-two billion, four hundred thirty million, sixty-five thousand, four hundred fifty-six".