999100021122017 has 2 divisors, whose sum is σ = 999100021122018. Its totient is φ = 999100021122016.

The previous prime is 999100021121957. The next prime is 999100021122067. The reversal of 999100021122017 is 710221120001999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 555971881851136 + 443128139270881 = 23579056^2 + 21050609^2 .

It is a cyclic number.

It is not a de Polignac number, because 999100021122017 - 2¹⁶ = 999100021056481 is a prime.

It is not a weakly prime, because it can be changed into another prime (999100021122067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499550010561008 + 499550010561009.

It is an arithmetic number, because the mean of its divisors is an integer number (499550010561009).

Almost surely, 2^{999100021122017} is an apocalyptic number.

It is an amenable number.

999100021122017 is a deficient number, since it is larger than the sum of its proper divisors (1).

999100021122017 is an equidigital number, since it uses as much as digits as its factorization.

999100021122017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 44.

The spelling of 999100021122017 in words is "nine hundred ninety-nine trillion, one hundred billion, twenty-one million, one hundred twenty-two thousand, seventeen".