21115114 has 4 divisors (see below), whose sum is σ = 31672674. Its totient is φ = 10557556.

The previous prime is 21115093. The next prime is 21115141. The reversal of 21115114 is 41151112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 21114025 + 1089 = 4595^2 + 33^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5278777 + ... + 5278780.

Almost surely, 2^21115114 is an apocalyptic number.

21115114 is a deficient number, since it is larger than the sum of its proper divisors (10557560).

21115114 is a wasteful number, since it uses less digits than its factorization.

21115114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10557559.

The product of its digits is 40, while the sum is 16.

The square root of 21115114 is about 4595.1184968399. The cubic root of 21115114 is about 276.3956116929.

Adding to 21115114 its reverse (41151112), we get a palindrome (62266226).

It can be divided in two parts, 2111 and 5114, that added together give a square (7225 = 85²).

The spelling of 21115114 in words is "twenty-one million, one hundred fifteen thousand, one hundred fourteen".