999000201301221 has 12 divisors (see below), whose sum is σ = 1549469699977632. Its totient is φ = 570857257886328.

The previous prime is 999000201301189. The next prime is 999000201301241. The reversal of 999000201301221 is 122103102000999.

It is not a de Polignac number, because 999000201301221 - 2⁵ = 999000201301189 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 999000201301221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999000201301241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3397959868225 + ... + 3397959868518.

It is an arithmetic number, because the mean of its divisors is an integer number (129122474998136).

Almost surely, 2^{999000201301221} is an apocalyptic number.

It is an amenable number.

999000201301221 is a deficient number, since it is larger than the sum of its proper divisors (550469498676411).

999000201301221 is a wasteful number, since it uses less digits than its factorization.

999000201301221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6795919736760 (or 6795919736753 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 39.

The spelling of 999000201301221 in words is "nine hundred ninety-nine trillion, two hundred one million, three hundred one thousand, two hundred twenty-one".