21114212 has 24 divisors (see below), whose sum is σ = 42947520. Its totient is φ = 8894880.

The previous prime is 21114211. The next prime is 21114217. The reversal of 21114212 is 21241112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (21114211) 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, 4739 + ... + 8042.

It is an arithmetic number, because the mean of its divisors is an integer number (1789480).

Almost surely, 2^21114212 is an apocalyptic number.

It is an amenable number.

21114212 is an abundant number, since it is smaller than the sum of its proper divisors (21833308).

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

21114212 is a wasteful number, since it uses less digits than its factorization.

21114212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12851 (or 12849 counting only the distinct ones).

The product of its digits is 32, while the sum is 14.

The square root of 21114212 is about 4595.0203481595. The cubic root of 21114212 is about 276.3916759277.

Adding to 21114212 its reverse (21241112), we get a palindrome (42355324).

The spelling of 21114212 in words is "twenty-one million, one hundred fourteen thousand, two hundred twelve".