21003241115 has 8 divisors (see below), whose sum is σ = 25253408880. Its totient is φ = 16769579872.

The previous prime is 21003241109. The next prime is 21003241153. The reversal of 21003241115 is 51114230012.

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

It is a cyclic number.

It is not a de Polignac number, because 21003241115 - 2⁴ = 21003241099 is a prime.

It is a super-2 number, since 2×21003241115² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4123829 + ... + 4128918.

It is an arithmetic number, because the mean of its divisors is an integer number (3156676110).

Almost surely, 2^21003241115 is an apocalyptic number.

21003241115 is a deficient number, since it is larger than the sum of its proper divisors (4250167765).

21003241115 is an equidigital number, since it uses as much as digits as its factorization.

21003241115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8253261.

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 21003241115 its reverse (51114230012), we get a palindrome (72117471127).

The spelling of 21003241115 in words is "twenty-one billion, three million, two hundred forty-one thousand, one hundred fifteen".