21312114 has 16 divisors (see below), whose sum is σ = 42813120. Its totient is φ = 7072560.

The previous prime is 21312113. The next prime is 21312121. The reversal of 21312114 is 41121312.

It is a junction number, because it is equal to n+sod(n) for n = 21312093 and 21312102.

It is not an unprimeable number, because it can be changed into a prime (21312113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6382 + ... + 9129.

It is an arithmetic number, because the mean of its divisors is an integer number (2675820).

Almost surely, 2^21312114 is an apocalyptic number.

21312114 is an abundant number, since it is smaller than the sum of its proper divisors (21501006).

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

21312114 is a wasteful number, since it uses less digits than its factorization.

21312114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15745.

The product of its digits is 48, while the sum is 15.

The square root of 21312114 is about 4616.5045218217. The cubic root of 21312114 is about 277.2525250858.

Adding to 21312114 its reverse (41121312), we get a palindrome (62433426).

The spelling of 21312114 in words is "twenty-one million, three hundred twelve thousand, one hundred fourteen".