21115333612303 has 16 divisors (see below), whose sum is σ = 24375130430464. Its totient is φ = 17917217716320.

The previous prime is 21115333612267. The next prime is 21115333612339. The reversal of 21115333612303 is 30321633351112.

It is an interprime number because it is at equal distance from previous prime (21115333612267) and next prime (21115333612339).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21115333612303 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 (21115333612343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35150925 + ... + 35746582.

It is an arithmetic number, because the mean of its divisors is an integer number (1523445651904).

Almost surely, 2^{21115333612303} is an apocalyptic number.

21115333612303 is a deficient number, since it is larger than the sum of its proper divisors (3259796818161).

21115333612303 is a wasteful number, since it uses less digits than its factorization.

21115333612303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70897942.

The product of its (nonzero) digits is 29160, while the sum is 34.

Adding to 21115333612303 its reverse (30321633351112), we get a palindrome (51436966963415).

The spelling of 21115333612303 in words is "twenty-one trillion, one hundred fifteen billion, three hundred thirty-three million, six hundred twelve thousand, three hundred three".