21115514014103 has 16 divisors (see below), whose sum is σ = 21413715505344. Its totient is φ = 20819442278400.

The previous prime is 21115514014087. The next prime is 21115514014109. The reversal of 21115514014103 is 30141041551112.

It is a cyclic number.

It is not a de Polignac number, because 21115514014103 - 2⁴ = 21115514014087 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 (21115514014109) 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, 144260051 + ... + 144406347.

It is an arithmetic number, because the mean of its divisors is an integer number (1338357219084).

Almost surely, 2^{21115514014103} is an apocalyptic number.

21115514014103 is a deficient number, since it is larger than the sum of its proper divisors (298201491241).

21115514014103 is a wasteful number, since it uses less digits than its factorization.

21115514014103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153562.

The product of its (nonzero) digits is 2400, while the sum is 29.

Adding to 21115514014103 its reverse (30141041551112), we get a palindrome (51256555565215).

The spelling of 21115514014103 in words is "twenty-one trillion, one hundred fifteen billion, five hundred fourteen million, fourteen thousand, one hundred three".