21106002167 has 8 divisors (see below), whose sum is σ = 21741934992. Its totient is φ = 20473516800.

The previous prime is 21106002157. The next prime is 21106002173. The reversal of 21106002167 is 76120060112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21106002167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21106002157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 849434 + ... + 873927.

It is an arithmetic number, because the mean of its divisors is an integer number (2717741874).

Almost surely, 2^21106002167 is an apocalyptic number.

21106002167 is a deficient number, since it is larger than the sum of its proper divisors (635932825).

21106002167 is a wasteful number, since it uses less digits than its factorization.

21106002167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1723729.

The product of its (nonzero) digits is 1008, while the sum is 26.

Adding to 21106002167 its reverse (76120060112), we get a palindrome (97226062279).

The spelling of 21106002167 in words is "twenty-one billion, one hundred six million, two thousand, one hundred sixty-seven".