999999010101001 has 8 divisors (see below), whose sum is σ = 1025080917450408. Its totient is φ = 974950040256000.

The previous prime is 999999010100927. The next prime is 999999010101023. The reversal of 999999010101001 is 100101010999999.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3345222710025 + 996653787390976 = 1828995^2 + 31569824^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 999999010101001 - 2⁴⁷ = 859261521745673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999999010101031) 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, 8234314620 + ... + 8234436061.

It is an arithmetic number, because the mean of its divisors is an integer number (128135114681301).

Almost surely, 2^{999999010101001} is an apocalyptic number.

It is an amenable number.

999999010101001 is a deficient number, since it is larger than the sum of its proper divisors (25081907349407).

999999010101001 is a wasteful number, since it uses less digits than its factorization.

999999010101001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16468752203.

The product of its (nonzero) digits is 531441, while the sum is 58.

The spelling of 999999010101001 in words is "nine hundred ninety-nine trillion, nine hundred ninety-nine billion, ten million, one hundred one thousand, one".