100213021 has 8 divisors (see below), whose sum is σ = 102772800. Its totient is φ = 97685280.

The previous prime is 100213019. The next prime is 100213031. The reversal of 100213021 is 120312001.

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 100213021 - 2¹ = 100213019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100212989 and 100213007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100213031) 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, 1611 + ... + 14248.

It is an arithmetic number, because the mean of its divisors is an integer number (12846600).

Almost surely, 2^100213021 is an apocalyptic number.

It is an amenable number.

100213021 is a deficient number, since it is larger than the sum of its proper divisors (2559779).

100213021 is an equidigital number, since it uses as much as digits as its factorization.

100213021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16019.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 100213021 is about 10010.6453837902. The cubic root of 100213021 is about 464.4882349075.

Adding to 100213021 its reverse (120312001), we get a palindrome (220525022).

The spelling of 100213021 in words is "one hundred million, two hundred thirteen thousand, twenty-one".