21135101303 has 8 divisors (see below), whose sum is σ = 21178314768. Its totient is φ = 21091924224.

The previous prime is 21135101287. The next prime is 21135101311. The reversal of 21135101303 is 30310153112.

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 21135101303 - 2⁴ = 21135101287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21135101333) 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, 1356425 + ... + 1371917.

It is an arithmetic number, because the mean of its divisors is an integer number (2647289346).

Almost surely, 2^21135101303 is an apocalyptic number.

21135101303 is a deficient number, since it is larger than the sum of its proper divisors (43213465).

21135101303 is a wasteful number, since it uses less digits than its factorization.

21135101303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18193.

The product of its (nonzero) digits is 270, while the sum is 20.

Adding to 21135101303 its reverse (30310153112), we get a palindrome (51445254415).

The spelling of 21135101303 in words is "twenty-one billion, one hundred thirty-five million, one hundred one thousand, three hundred three".