21202041 has 8 divisors (see below), whose sum is σ = 32307904. Its totient is φ = 12115440.

The previous prime is 21202039. The next prime is 21202079. The reversal of 21202041 is 14020212.

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

It is not a de Polignac number, because 21202041 - 2¹ = 21202039 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21202001) 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, 504790 + ... + 504831.

It is an arithmetic number, because the mean of its divisors is an integer number (4038488).

Almost surely, 2^21202041 is an apocalyptic number.

21202041 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21202041 is a deficient number, since it is larger than the sum of its proper divisors (11105863).

21202041 is a wasteful number, since it uses less digits than its factorization.

21202041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009631.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 21202041 is about 4604.5674063912. The cubic root of 21202041 is about 276.7743821795.

Adding to 21202041 its reverse (14020212), we get a palindrome (35222253).

The spelling of 21202041 in words is "twenty-one million, two hundred two thousand, forty-one".