21014211 has 4 divisors (see below), whose sum is σ = 28018952. Its totient is φ = 14009472.

The previous prime is 21014179. The next prime is 21014233. The reversal of 21014211 is 11241012.

It is a happy number.

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

It is not a de Polignac number, because 21014211 - 2⁵ = 21014179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21014611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3502366 + ... + 3502371.

It is an arithmetic number, because the mean of its divisors is an integer number (7004738).

Almost surely, 2^21014211 is an apocalyptic number.

21014211 is a deficient number, since it is larger than the sum of its proper divisors (7004741).

21014211 is an equidigital number, since it uses as much as digits as its factorization.

21014211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7004740.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 21014211 is about 4584.1259799443. The cubic root of 21014211 is about 275.9546370521.

Adding to 21014211 its reverse (11241012), we get a palindrome (32255223).

The spelling of 21014211 in words is "twenty-one million, fourteen thousand, two hundred eleven".