21034011 has 8 divisors (see below), whose sum is σ = 28071184. Its totient is φ = 14009760.

The previous prime is 21034003. The next prime is 21034033. The reversal of 21034011 is 11043012.

It is a happy number.

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

It is not a de Polignac number, because 21034011 - 2³ = 21034003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21034061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1605 + ... + 6681.

It is an arithmetic number, because the mean of its divisors is an integer number (3508898).

Almost surely, 2^21034011 is an apocalyptic number.

21034011 is a deficient number, since it is larger than the sum of its proper divisors (7037173).

21034011 is a wasteful number, since it uses less digits than its factorization.

21034011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6461.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 21034011 is about 4586.2850979851. The cubic root of 21034011 is about 276.0412797950.

Adding to 21034011 its reverse (11043012), we get a palindrome (32077023).

Subtracting from 21034011 its reverse (11043012), we obtain a palindrome (9990999).

It can be divided in two parts, 210 and 34011, that multiplied together give a triangular number (7142310 = T₃₇₇₉).

The spelling of 21034011 in words is "twenty-one million, thirty-four thousand, eleven".