21211034 has 8 divisors (see below), whose sum is σ = 34264020. Its totient is φ = 9789696.

The previous prime is 21211033. The next prime is 21211039. The reversal of 21211034 is 43011212.

It can be written as a sum of positive squares in 2 ways, for example, as 20566225 + 644809 = 4535^2 + 803^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21211033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 407879 + ... + 407930.

Almost surely, 2^21211034 is an apocalyptic number.

21211034 is a deficient number, since it is larger than the sum of its proper divisors (13052986).

21211034 is a wasteful number, since it uses less digits than its factorization.

21211034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815824.

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

The square root of 21211034 is about 4605.5438332514. The cubic root of 21211034 is about 276.8135086043.

Adding to 21211034 its reverse (43011212), we get a palindrome (64222246).

The spelling of 21211034 in words is "twenty-one million, two hundred eleven thousand, thirty-four".