21167101006 has 4 divisors (see below), whose sum is σ = 31750651512. Its totient is φ = 10583550502.

The previous prime is 21167100967. The next prime is 21167101057. The reversal of 21167101006 is 60010176112.

It is a happy number.

It is a semiprime because it is the product of two primes.

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 as a sum of consecutive naturals, namely, 5291775250 + ... + 5291775253.

It is an arithmetic number, because the mean of its divisors is an integer number (7937662878).

Almost surely, 2^21167101006 is an apocalyptic number.

21167101006 is a deficient number, since it is larger than the sum of its proper divisors (10583550506).

21167101006 is a wasteful number, since it uses less digits than its factorization.

21167101006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10583550505.

The product of its (nonzero) digits is 504, while the sum is 25.

Adding to 21167101006 its reverse (60010176112), we get a palindrome (81177277118).

The spelling of 21167101006 in words is "twenty-one billion, one hundred sixty-seven million, one hundred one thousand, six".