21114205 has 16 divisors (see below), whose sum is σ = 29142144. Its totient is φ = 14385600.

The previous prime is 21114173. The next prime is 21114209. The reversal of 21114205 is 50241112.

It is not a de Polignac number, because 21114205 - 2⁵ = 21114173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21114209) 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, 3855 + ... + 7555.

It is an arithmetic number, because the mean of its divisors is an integer number (1821384).

Almost surely, 2^21114205 is an apocalyptic number.

It is an amenable number.

21114205 is a deficient number, since it is larger than the sum of its proper divisors (8027939).

21114205 is a wasteful number, since it uses less digits than its factorization.

21114205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3876.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 21114205 is about 4595.0195864653. The cubic root of 21114205 is about 276.3916453836.

Adding to 21114205 its reverse (50241112), we get a palindrome (71355317).

The spelling of 21114205 in words is "twenty-one million, one hundred fourteen thousand, two hundred five".