21222114 has 8 divisors (see below), whose sum is σ = 42444240. Its totient is φ = 7074036.

The previous prime is 21222043. The next prime is 21222143. The reversal of 21222114 is 41122212.

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

21222114 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21222093 and 21222102.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1768504 + ... + 1768515.

It is an arithmetic number, because the mean of its divisors is an integer number (5305530).

Almost surely, 2^21222114 is an apocalyptic number.

21222114 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21222114 is a wasteful number, since it uses less digits than its factorization.

21222114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3537024.

The product of its digits is 64, while the sum is 15.

The square root of 21222114 is about 4606.7465743190. The cubic root of 21222114 is about 276.8616998708.

Adding to 21222114 its reverse (41122212), we get a palindrome (62344326).

The spelling of 21222114 in words is "twenty-one million, two hundred twenty-two thousand, one hundred fourteen".