16867318121 has 2 divisors, whose sum is σ = 16867318122. Its totient is φ = 16867318120.

The previous prime is 16867318081. The next prime is 16867318187. The reversal of 16867318121 is 12181376861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16836360025 + 30958096 = 129755^2 + 5564^2 .

It is a cyclic number.

It is not a de Polignac number, because 16867318121 - 2³⁰ = 15793576297 is a prime.

It is not a weakly prime, because it can be changed into another prime (16867318921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8433659060 + 8433659061.

It is an arithmetic number, because the mean of its divisors is an integer number (8433659061).

Almost surely, 2^16867318121 is an apocalyptic number.

It is an amenable number.

16867318121 is a deficient number, since it is larger than the sum of its proper divisors (1).

16867318121 is an equidigital number, since it uses as much as digits as its factorization.

16867318121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 44.

The spelling of 16867318121 in words is "sixteen billion, eight hundred sixty-seven million, three hundred eighteen thousand, one hundred twenty-one".