100020231 has 16 divisors (see below), whose sum is σ = 156895200. Its totient is φ = 62757504.

The previous prime is 100020191. The next prime is 100020233. The reversal of 100020231 is 132020001.

It is a happy number.

It is not a de Polignac number, because 100020231 - 2⁷ = 100020103 is a prime.

It is a super-2 number, since 2×100020231² = 20008093218586722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100020233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108496 + ... + 109413.

It is an arithmetic number, because the mean of its divisors is an integer number (9805950).

Almost surely, 2^100020231 is an apocalyptic number.

100020231 is a deficient number, since it is larger than the sum of its proper divisors (56874969).

100020231 is a wasteful number, since it uses less digits than its factorization.

100020231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217935 (or 217929 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 100020231 is about 10001.0114988435. The cubic root of 100020231 is about 464.1901825786.

Adding to 100020231 its reverse (132020001), we get a palindrome (232040232).

The spelling of 100020231 in words is "one hundred million, twenty thousand, two hundred thirty-one".