100214021 has 4 divisors (see below), whose sum is σ = 100234092. Its totient is φ = 100193952.

The previous prime is 100214003. The next prime is 100214029. The reversal of 100214021 is 120412001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120412001 = 83 ⋅1450747.

It can be written as a sum of positive squares in 2 ways, for example, as 53085796 + 47128225 = 7286^2 + 6865^2 .

It is a cyclic number.

It is not a de Polignac number, because 100214021 - 2¹⁰ = 100212997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 100213993 and 100214011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100214029) 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 3 ways as a sum of consecutive naturals, for example, 3971 + ... + 14703.

It is an arithmetic number, because the mean of its divisors is an integer number (25058523).

Almost surely, 2^100214021 is an apocalyptic number.

It is an amenable number.

100214021 is a deficient number, since it is larger than the sum of its proper divisors (20071).

100214021 is an equidigital number, since it uses as much as digits as its factorization.

100214021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20070.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 100214021 is about 10010.6953304953. The cubic root of 100214021 is about 464.4897799053.

Adding to 100214021 its reverse (120412001), we get a palindrome (220626022).

The spelling of 100214021 in words is "one hundred million, two hundred fourteen thousand, twenty-one".