198021011001 has 24 divisors (see below), whose sum is σ = 292428044832. Its totient is φ = 119096577600.

The previous prime is 198021010963. The next prime is 198021011033. The reversal of 198021011001 is 100110120891.

It is not a de Polignac number, because 198021011001 - 2²⁶ = 197953902137 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (198021011051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2034556 + ... + 2129661.

It is an arithmetic number, because the mean of its divisors is an integer number (12184501868).

Almost surely, 2^198021011001 is an apocalyptic number.

198021011001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

198021011001 is a deficient number, since it is larger than the sum of its proper divisors (94407033831).

198021011001 is a wasteful number, since it uses less digits than its factorization.

198021011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4164373 (or 4164362 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 24.

Adding to 198021011001 its reverse (100110120891), we get a palindrome (298131131892).

The spelling of 198021011001 in words is "one hundred ninety-eight billion, twenty-one million, eleven thousand, one".