1001200021197 has 16 divisors (see below), whose sum is σ = 1348300676160. Its totient is φ = 660784496000.

The previous prime is 1001200021193. The next prime is 1001200021229. The reversal of 1001200021197 is 7911200021001.

It is a cyclic number.

It is not a de Polignac number, because 1001200021197 - 2² = 1001200021193 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001200021193) 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 15 ways as a sum of consecutive naturals, for example, 2610922 + ... + 2969732.

It is an arithmetic number, because the mean of its divisors is an integer number (84268792260).

Almost surely, 2^{1001200021197} is an apocalyptic number.

It is an amenable number.

1001200021197 is a deficient number, since it is larger than the sum of its proper divisors (347100654963).

1001200021197 is a wasteful number, since it uses less digits than its factorization.

1001200021197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368124.

The product of its (nonzero) digits is 252, while the sum is 24.

Adding to 1001200021197 its reverse (7911200021001), we get a palindrome (8912400042198).

The spelling of 1001200021197 in words is "one trillion, one billion, two hundred million, twenty-one thousand, one hundred ninety-seven".