21226335245505 has 96 divisors (see below), whose sum is σ = 40764661217280. Its totient is φ = 10149646394880.

The previous prime is 21226335245491. The next prime is 21226335245551. The reversal of 21226335245505 is 50554253362212.

21226335245505 is a `hidden beast` number, since 2 + 1 + 2 + 2 + 63 + 35 + 2 + 4 + 550 + 5 = 666.

It is not a de Polignac number, because 21226335245505 - 2⁹ = 21226335244993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 95 ways as a sum of consecutive naturals, for example, 11500576 + ... + 13218014.

It is an arithmetic number, because the mean of its divisors is an integer number (424631887680).

Almost surely, 2^{21226335245505} is an apocalyptic number.

It is an amenable number.

21226335245505 is a deficient number, since it is larger than the sum of its proper divisors (19538325971775).

21226335245505 is a wasteful number, since it uses less digits than its factorization.

21226335245505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1718071 (or 1718068 counting only the distinct ones).

The product of its (nonzero) digits is 2160000, while the sum is 45.

The spelling of 21226335245505 in words is "twenty-one trillion, two hundred twenty-six billion, three hundred thirty-five million, two hundred forty-five thousand, five hundred five".