21002112110167 has 2 divisors, whose sum is σ = 21002112110168. Its totient is φ = 21002112110166.

The previous prime is 21002112110101. The next prime is 21002112110173. The reversal of 21002112110167 is 76101121120012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21002112110167 - 2³⁵ = 20967752371799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21002112110867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501056055083 + 10501056055084.

It is an arithmetic number, because the mean of its divisors is an integer number (10501056055084).

Almost surely, 2^{21002112110167} is an apocalyptic number.

21002112110167 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002112110167 is an equidigital number, since it uses as much as digits as its factorization.

21002112110167 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 25.

Adding to 21002112110167 its reverse (76101121120012), we get a palindrome (97103233230179).

The spelling of 21002112110167 in words is "twenty-one trillion, two billion, one hundred twelve million, one hundred ten thousand, one hundred sixty-seven".