21041371 has 8 divisors (see below), whose sum is σ = 23088240. Its totient is φ = 19055712.

The previous prime is 21041369. The next prime is 21041381. The reversal of 21041371 is 17314012.

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

It is not a de Polignac number, because 21041371 - 2¹ = 21041369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21041381) 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, 14581 + ... + 15958.

It is an arithmetic number, because the mean of its divisors is an integer number (2886030).

Almost surely, 2^21041371 is an apocalyptic number.

21041371 is a deficient number, since it is larger than the sum of its proper divisors (2046869).

21041371 is a wasteful number, since it uses less digits than its factorization.

21041371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30605.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 21041371 is about 4587.0874201393. The cubic root of 21041371 is about 276.0734725280.

Adding to 21041371 its reverse (17314012), we get a palindrome (38355383).

It can be divided in two parts, 21041 and 371, that added together give a palindrome (21412).

The spelling of 21041371 in words is "twenty-one million, forty-one thousand, three hundred seventy-one".