21114012 has 24 divisors (see below), whose sum is σ = 49543312. Its totient is φ = 6998400.

The previous prime is 21114011. The next prime is 21114019. The reversal of 21114012 is 21041112.

It is a happy number.

It is a super-2 number, since 2×21114012² = 891603005472288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21114011) 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, 2689 + ... + 7032.

Almost surely, 2^21114012 is an apocalyptic number.

It is an amenable number.

21114012 is an abundant number, since it is smaller than the sum of its proper divisors (28429300).

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

21114012 is a wasteful number, since it uses less digits than its factorization.

21114012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9909 (or 9907 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 21114012 is about 4594.9985854187. The cubic root of 21114012 is about 276.3908032373.

Adding to 21114012 its reverse (21041112), we get a palindrome (42155124).

Subtracting from 21114012 its reverse (21041112), we obtain a square (72900 = 270²).

The spelling of 21114012 in words is "twenty-one million, one hundred fourteen thousand, twelve".