21122838859 has 12 divisors (see below), whose sum is σ = 22390516560. Its totient is φ = 19923647760.

The previous prime is 21122838833. The next prime is 21122838871. The reversal of 21122838859 is 95883822112.

It is not a de Polignac number, because 21122838859 - 2¹⁷ = 21122707787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21122838829) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 45087 + ... + 210424.

It is an arithmetic number, because the mean of its divisors is an integer number (1865876380).

Almost surely, 2^21122838859 is an apocalyptic number.

21122838859 is a deficient number, since it is larger than the sum of its proper divisors (1267677701).

21122838859 is a wasteful number, since it uses less digits than its factorization.

21122838859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255778 (or 255759 counting only the distinct ones).

The product of its digits is 552960, while the sum is 49.

The spelling of 21122838859 in words is "twenty-one billion, one hundred twenty-two million, eight hundred thirty-eight thousand, eight hundred fifty-nine".