198021011000 has 128 divisors (see below), whose sum is σ = 473831804160. Its totient is φ = 77424256000.

The previous prime is 198021010963. The next prime is 198021011033. The reversal of 198021011000 is 110120891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44788790 + ... + 44793210.

It is an arithmetic number, because the mean of its divisors is an integer number (3701810970).

Almost surely, 2^198021011000 is an apocalyptic number.

198021011000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198021011000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236915902080).

198021011000 is an abundant number, since it is smaller than the sum of its proper divisors (275810793160).

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

198021011000 is a wasteful number, since it uses less digits than its factorization.

198021011000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5442 (or 5428 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 23.

Adding to 198021011000 its reverse (110120891), we get a palindrome (198131131891).

The spelling of 198021011000 in words is "one hundred ninety-eight billion, twenty-one million, eleven thousand".