100021231188 has 48 divisors (see below), whose sum is σ = 268256184000. Its totient is φ = 32190740064.

The previous prime is 100021231187. The next prime is 100021231223. The reversal of 100021231188 is 881132120001.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100021231183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15964498 + ... + 15970761.

It is an arithmetic number, because the mean of its divisors is an integer number (5588670500).

Almost surely, 2^100021231188 is an apocalyptic number.

100021231188 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

100021231188 is an abundant number, since it is smaller than the sum of its proper divisors (168234952812).

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

100021231188 is a wasteful number, since it uses less digits than its factorization.

100021231188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31935301 (or 31935293 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

Adding to 100021231188 its reverse (881132120001), we get a palindrome (981153351189).

The spelling of 100021231188 in words is "one hundred billion, twenty-one million, two hundred thirty-one thousand, one hundred eighty-eight".