21073008572167 has 2 divisors, whose sum is σ = 21073008572168. Its totient is φ = 21073008572166.

The previous prime is 21073008572149. The next prime is 21073008572173. The reversal of 21073008572167 is 76127580037012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21073008572167 - 2³⁹ = 20523252758279 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21073008572167.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21073008572467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10536504286083 + 10536504286084.

It is an arithmetic number, because the mean of its divisors is an integer number (10536504286084).

Almost surely, 2^{21073008572167} is an apocalyptic number.

21073008572167 is a deficient number, since it is larger than the sum of its proper divisors (1).

21073008572167 is an equidigital number, since it uses as much as digits as its factorization.

21073008572167 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 987840, while the sum is 49.

The spelling of 21073008572167 in words is "twenty-one trillion, seventy-three billion, eight million, five hundred seventy-two thousand, one hundred sixty-seven".