21122838873 has 48 divisors (see below), whose sum is σ = 31506034560. Its totient is φ = 13629192192.

The previous prime is 21122838871. The next prime is 21122838907. The reversal of 21122838873 is 37883822112.

It is not a de Polignac number, because 21122838873 - 2¹ = 21122838871 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21122838871) 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 47 ways as a sum of consecutive naturals, for example, 29054436 + ... + 29055162.

It is an arithmetic number, because the mean of its divisors is an integer number (656375720).

Almost surely, 2^21122838873 is an apocalyptic number.

It is an amenable number.

21122838873 is a deficient number, since it is larger than the sum of its proper divisors (10383195687).

21122838873 is a wasteful number, since it uses less digits than its factorization.

21122838873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358 (or 1355 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The spelling of 21122838873 in words is "twenty-one billion, one hundred twenty-two million, eight hundred thirty-eight thousand, eight hundred seventy-three".