21315001135 has 8 divisors (see below), whose sum is σ = 26924212080. Its totient is φ = 16154527104.

The previous prime is 21315001133. The next prime is 21315001153. The reversal of 21315001135 is 53110051312.

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 21315001135 - 2¹ = 21315001133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21315001133) 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, 112184122 + ... + 112184311.

It is an arithmetic number, because the mean of its divisors is an integer number (3365526510).

Almost surely, 2^21315001135 is an apocalyptic number.

21315001135 is a deficient number, since it is larger than the sum of its proper divisors (5609210945).

21315001135 is a wasteful number, since it uses less digits than its factorization.

21315001135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224368457.

The product of its (nonzero) digits is 450, while the sum is 22.

Adding to 21315001135 its reverse (53110051312), we get a palindrome (74425052447).

The spelling of 21315001135 in words is "twenty-one billion, three hundred fifteen million, one thousand, one hundred thirty-five".