21021034 has 8 divisors (see below), whose sum is σ = 32902560. Its totient is φ = 10053516.

The previous prime is 21021001. The next prime is 21021043. The reversal of 21021034 is 43012012.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228444 + ... + 228535.

It is an arithmetic number, because the mean of its divisors is an integer number (4112820).

Almost surely, 2^21021034 is an apocalyptic number.

21021034 is a deficient number, since it is larger than the sum of its proper divisors (11881526).

21021034 is a wasteful number, since it uses less digits than its factorization.

21021034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457004.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 21021034 is about 4584.8701181168. The cubic root of 21021034 is about 275.9844999347.

Adding to 21021034 its reverse (43012012), we get a palindrome (64033046).

It can be divided in two parts, 2102 and 1034, that added together give a square (3136 = 56²).

The spelling of 21021034 in words is "twenty-one million, twenty-one thousand, thirty-four".