100201021998 has 32 divisors (see below), whose sum is σ = 249851900160. Its totient is φ = 26026239360.

The previous prime is 100201021919. The next prime is 100201022021. The reversal of 100201021998 is 899120102001.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 108442203 + ... + 108443126.

It is an arithmetic number, because the mean of its divisors is an integer number (7807871880).

Almost surely, 2^100201021998 is an apocalyptic number.

100201021998 is an abundant number, since it is smaller than the sum of its proper divisors (149650878162).

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

100201021998 is a wasteful number, since it uses less digits than its factorization.

100201021998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216885352.

The product of its (nonzero) digits is 2592, while the sum is 33.

Adding to 100201021998 its reverse (899120102001), we get a palindrome (999321123999).

The spelling of 100201021998 in words is "one hundred billion, two hundred one million, twenty-one thousand, nine hundred ninety-eight".