100012021 has 8 divisors (see below), whose sum is σ = 102245760. Its totient is φ = 97796352.

The previous prime is 100012019. The next prime is 100012049. The reversal of 100012021 is 120210001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100012021 - 2¹ = 100012019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100011995 and 100012013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100012421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6996 + ... + 15778.

It is an arithmetic number, because the mean of its divisors is an integer number (12780720).

Almost surely, 2^100012021 is an apocalyptic number.

It is an amenable number.

100012021 is a deficient number, since it is larger than the sum of its proper divisors (2233739).

100012021 is an equidigital number, since it uses as much as digits as its factorization.

100012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9035.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 100012021 is about 10000.6010319380. The cubic root of 100012021 is about 464.1774814625.

Adding to 100012021 its reverse (120210001), we get a palindrome (220222022).

The spelling of 100012021 in words is "one hundred million, twelve thousand, twenty-one".