1001201219999 has 12 divisors (see below), whose sum is σ = 1029232788504. Its totient is φ = 973887065424.

The previous prime is 1001201219981. The next prime is 1001201220001. The reversal of 1001201219999 is 9999121021001.

It is not a de Polignac number, because 1001201219999 - 2¹⁶ = 1001201154463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001201219939) 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, 1030232 + ... + 1750365.

It is an arithmetic number, because the mean of its divisors is an integer number (85769399042).

Almost surely, 2^{1001201219999} is an apocalyptic number.

1001201219999 is a deficient number, since it is larger than the sum of its proper divisors (28031568505).

1001201219999 is an equidigital number, since it uses as much as digits as its factorization.

1001201219999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2780854 (or 2780807 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 44.

The spelling of 1001201219999 in words is "one trillion, one billion, two hundred one million, two hundred nineteen thousand, nine hundred ninety-nine".