21126616107 has 8 divisors (see below), whose sum is σ = 28169917440. Its totient is φ = 14083862760.

The previous prime is 21126616039. The next prime is 21126616111. The reversal of 21126616107 is 70161662112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21126616107 - 2¹⁴ = 21126599723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21126616127) 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 7 ways as a sum of consecutive naturals, for example, 36507 + ... + 208772.

It is an arithmetic number, because the mean of its divisors is an integer number (3521239680).

Almost surely, 2^21126616107 is an apocalyptic number.

21126616107 is a deficient number, since it is larger than the sum of its proper divisors (7043301333).

21126616107 is a wasteful number, since it uses less digits than its factorization.

21126616107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273993.

The product of its (nonzero) digits is 6048, while the sum is 33.

The spelling of 21126616107 in words is "twenty-one billion, one hundred twenty-six million, six hundred sixteen thousand, one hundred seven".