21031114 has 32 divisors (see below), whose sum is σ = 35315280. Its totient is φ = 9331200.

The previous prime is 21031111. The next prime is 21031151. The reversal of 21031114 is 41113012.

It can be written as a sum of positive squares in 8 ways, for example, as 100489 + 20930625 = 317^2 + 4575^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 21031094 and 21031103.

It is not an unprimeable number, because it can be changed into a prime (21031111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116104 + ... + 116284.

Almost surely, 2^21031114 is an apocalyptic number.

21031114 is a deficient number, since it is larger than the sum of its proper divisors (14284166).

21031114 is a wasteful number, since it uses less digits than its factorization.

21031114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 21031114 is about 4585.9692541490. The cubic root of 21031114 is about 276.0286062207.

Adding to 21031114 its reverse (41113012), we get a palindrome (62144126).

The spelling of 21031114 in words is "twenty-one million, thirty-one thousand, one hundred fourteen".