21130041 has 8 divisors (see below), whose sum is σ = 28194784. Its totient is φ = 14076000.

The previous prime is 21130037. The next prime is 21130049. The reversal of 21130041 is 14003112.

Added to its reverse (14003112) it gives a triangular number (35133153 = T₈₃₈₂).

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 21130041 - 2² = 21130037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21129999 and 21130026.

It is not an unprimeable number, because it can be changed into a prime (21130049) 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, 5541 + ... + 8541.

It is an arithmetic number, because the mean of its divisors is an integer number (3524348).

Almost surely, 2^21130041 is an apocalyptic number.

It is an amenable number.

21130041 is a deficient number, since it is larger than the sum of its proper divisors (7064743).

21130041 is a wasteful number, since it uses less digits than its factorization.

21130041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5351.

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

The square root of 21130041 is about 4596.7424335066. The cubic root of 21130041 is about 276.4607275378.

Adding to 21130041 its reverse (14003112), we get a palindrome (35133153).

The spelling of 21130041 in words is "twenty-one million, one hundred thirty thousand, forty-one".