21034211 has 8 divisors (see below), whose sum is σ = 23015664. Its totient is φ = 19064320.

The previous prime is 21034201. The next prime is 21034229. The reversal of 21034211 is 11243012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21034211 - 2¹⁸ = 20772067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21034201) 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, 1175 + ... + 6591.

It is an arithmetic number, because the mean of its divisors is an integer number (2876958).

Almost surely, 2^21034211 is an apocalyptic number.

21034211 is a deficient number, since it is larger than the sum of its proper divisors (1981453).

21034211 is a wasteful number, since it uses less digits than its factorization.

21034211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5781.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 21034211 is about 4586.3069020727. The cubic root of 21034211 is about 276.0421546968.

Adding to 21034211 its reverse (11243012), we get a palindrome (32277223).

The spelling of 21034211 in words is "twenty-one million, thirty-four thousand, two hundred eleven".