1001020001172 has 12 divisors (see below), whose sum is σ = 2335713336096. Its totient is φ = 333673333720.

The previous prime is 1001020001171. The next prime is 1001020001209. The reversal of 1001020001172 is 2711000201001.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001020001171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41709166704 + ... + 41709166727.

It is an arithmetic number, because the mean of its divisors is an integer number (194642778008).

Almost surely, 2^{1001020001172} is an apocalyptic number.

1001020001172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1001020001172 is an abundant number, since it is smaller than the sum of its proper divisors (1334693334924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1001020001172 is a wasteful number, since it uses less digits than its factorization.

1001020001172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83418333438 (or 83418333436 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 15.

Adding to 1001020001172 its reverse (2711000201001), we get a palindrome (3712020202173).

The spelling of 1001020001172 in words is "one trillion, one billion, twenty million, one thousand, one hundred seventy-two".