1001200021198 has 32 divisors (see below), whose sum is σ = 1771510124160. Its totient is φ = 419913500160.

The previous prime is 1001200021193. The next prime is 1001200021229. The reversal of 1001200021198 is 8911200021001.

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, 39041638 + ... + 39067273.

It is an arithmetic number, because the mean of its divisors is an integer number (55359691380).

Almost surely, 2^{1001200021198} is an apocalyptic number.

1001200021198 is a deficient number, since it is larger than the sum of its proper divisors (770310102962).

1001200021198 is a wasteful number, since it uses less digits than its factorization.

1001200021198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78108972.

The product of its (nonzero) digits is 288, while the sum is 25.

Adding to 1001200021198 its reverse (8911200021001), we get a palindrome (9912400042199).

The spelling of 1001200021198 in words is "one trillion, one billion, two hundred million, twenty-one thousand, one hundred ninety-eight".