21167101005 has 32 divisors (see below), whose sum is σ = 34394270976. Its totient is φ = 11114755584.

The previous prime is 21167100967. The next prime is 21167101057. The reversal of 21167101005 is 50010176112.

It is not a de Polignac number, because 21167101005 - 2⁸ = 21167100749 is a prime.

It is a Curzon number.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 227689 + ... + 306881.

It is an arithmetic number, because the mean of its divisors is an integer number (1074820968).

Almost surely, 2^21167101005 is an apocalyptic number.

It is an amenable number.

21167101005 is a deficient number, since it is larger than the sum of its proper divisors (13227169971).

21167101005 is a wasteful number, since it uses less digits than its factorization.

21167101005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79477.

The product of its (nonzero) digits is 420, while the sum is 24.

Adding to 21167101005 its reverse (50010176112), we get a palindrome (71177277117).

The spelling of 21167101005 in words is "twenty-one billion, one hundred sixty-seven million, one hundred one thousand, five".