1001021201109 has 24 divisors (see below), whose sum is σ = 1500307728920. Its totient is φ = 642617100288.

The previous prime is 1001021201107. The next prime is 1001021201119. The reversal of 1001021201109 is 9011021201001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 145220442084 + 855800759025 = 381078^2 + 925095^2 .

It is not a de Polignac number, because 1001021201109 - 2¹ = 1001021201107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001021201091 and 1001021201100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001021201107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15462904 + ... + 15527505.

Almost surely, 2^{1001021201109} is an apocalyptic number.

It is an amenable number.

1001021201109 is a deficient number, since it is larger than the sum of its proper divisors (499286527811).

1001021201109 is a wasteful number, since it uses less digits than its factorization.

1001021201109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30990549 (or 30990546 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The spelling of 1001021201109 in words is "one trillion, one billion, twenty-one million, two hundred one thousand, one hundred nine".