21102214 has 8 divisors (see below), whose sum is σ = 36175248. Its totient is φ = 9043800.

The previous prime is 21102209. The next prime is 21102239. The reversal of 21102214 is 41220112.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 21102194 and 21102203.

It is a congruent number.

It is an unprimeable number.

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, 753637 + ... + 753664.

It is an arithmetic number, because the mean of its divisors is an integer number (4521906).

Almost surely, 2^21102214 is an apocalyptic number.

21102214 is a deficient number, since it is larger than the sum of its proper divisors (15073034).

21102214 is a wasteful number, since it uses less digits than its factorization.

21102214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507310.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 21102214 is about 4593.7146189114. The cubic root of 21102214 is about 276.3393134770.

Adding to 21102214 its reverse (41220112), we get a palindrome (62322326).

It can be divided in two parts, 21102 and 214, that added together give a square (21316 = 146²).

The spelling of 21102214 in words is "twenty-one million, one hundred two thousand, two hundred fourteen".