21114312 has 32 divisors (see below), whose sum is σ = 52898400. Its totient is φ = 7023104.

The previous prime is 21114307. The next prime is 21114319. The reversal of 21114312 is 21341112.

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

It is a junction number, because it is equal to n+sod(n) for n = 21114291 and 21114300.

It is not an unprimeable number, because it can be changed into a prime (21114319) 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, 21823 + ... + 22769.

It is an arithmetic number, because the mean of its divisors is an integer number (1653075).

Almost surely, 2^21114312 is an apocalyptic number.

It is an amenable number.

21114312 is an abundant number, since it is smaller than the sum of its proper divisors (31784088).

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

21114312 is a wasteful number, since it uses less digits than its factorization.

21114312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1885 (or 1881 counting only the distinct ones).

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

The square root of 21114312 is about 4595.0312294913. The cubic root of 21114312 is about 276.3921122708.

Adding to 21114312 its reverse (21341112), we get a palindrome (42455424).

The spelling of 21114312 in words is "twenty-one million, one hundred fourteen thousand, three hundred twelve".