21100214 has 8 divisors (see below), whose sum is σ = 31774248. Its totient is φ = 10508800.

The previous prime is 21100207. The next prime is 21100217. The reversal of 21100214 is 41200112.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21100195 and 21100204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20012 + ... + 21039.

It is an arithmetic number, because the mean of its divisors is an integer number (3971781).

Almost surely, 2^21100214 is an apocalyptic number.

21100214 is a deficient number, since it is larger than the sum of its proper divisors (10674034).

21100214 is a wasteful number, since it uses less digits than its factorization.

21100214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41310.

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

The square root of 21100214 is about 4593.4969250017. The cubic root of 21100214 is about 276.3305830173.

Adding to 21100214 its reverse (41200112), we get a palindrome (62300326).

The spelling of 21100214 in words is "twenty-one million, one hundred thousand, two hundred fourteen".