100230021 has 32 divisors (see below), whose sum is σ = 156549120. Its totient is φ = 63253872.

The previous prime is 100230001. The next prime is 100230023. The reversal of 100230021 is 120032001.

It is a happy number.

It is not a de Polignac number, because 100230021 - 2⁵ = 100229989 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 100229985 and 100230012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100230023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63180 + ... + 64746.

It is an arithmetic number, because the mean of its divisors is an integer number (4892160).

Almost surely, 2^100230021 is an apocalyptic number.

It is an amenable number.

100230021 is a deficient number, since it is larger than the sum of its proper divisors (56319099).

100230021 is a wasteful number, since it uses less digits than its factorization.

100230021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1702 (or 1696 counting only the distinct ones).

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

The square root of 100230021 is about 10011.4944438880. The cubic root of 100230021 is about 464.5144984724.

Adding to 100230021 its reverse (120032001), we get a palindrome (220262022).

The spelling of 100230021 in words is "one hundred million, two hundred thirty thousand, twenty-one".