21226680105 has 32 divisors (see below), whose sum is σ = 36303724800. Its totient is φ = 10564561920.

The previous prime is 21226680103. The next prime is 21226680121. The reversal of 21226680105 is 50108662212.

It is not a de Polignac number, because 21226680105 - 2¹ = 21226680103 is a prime.

It is a super-2 number, since 2×21226680105² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21226680103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 736180 + ... + 764469.

It is an arithmetic number, because the mean of its divisors is an integer number (1134491400).

Almost surely, 2^21226680105 is an apocalyptic number.

It is an amenable number.

21226680105 is a deficient number, since it is larger than the sum of its proper divisors (15077044695).

21226680105 is a wasteful number, since it uses less digits than its factorization.

21226680105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500721.

The product of its (nonzero) digits is 11520, while the sum is 33.

The spelling of 21226680105 in words is "twenty-one billion, two hundred twenty-six million, six hundred eighty thousand, one hundred five".