21113012464663 has 16 divisors (see below), whose sum is σ = 25523158450176. Its totient is φ = 17072923538880.

The previous prime is 21113012464637. The next prime is 21113012464693. The reversal of 21113012464663 is 36646421031112.

It is a cyclic number.

It is not a de Polignac number, because 21113012464663 - 2⁹ = 21113012464151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113012464693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 898184983 + ... + 898208488.

It is an arithmetic number, because the mean of its divisors is an integer number (1595197403136).

Almost surely, 2^{21113012464663} is an apocalyptic number.

21113012464663 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21113012464663 is a deficient number, since it is larger than the sum of its proper divisors (4410145985513).

21113012464663 is a wasteful number, since it uses less digits than its factorization.

21113012464663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1796393574.

The product of its (nonzero) digits is 124416, while the sum is 40.

Adding to 21113012464663 its reverse (36646421031112), we get a palindrome (57759433495775).

The spelling of 21113012464663 in words is "twenty-one trillion, one hundred thirteen billion, twelve million, four hundred sixty-four thousand, six hundred sixty-three".