21120440012103 has 8 divisors (see below), whose sum is σ = 28160608239216. Its totient is φ = 14080282563200.

The previous prime is 21120440012051. The next prime is 21120440012107. The reversal of 21120440012103 is 30121004402112.

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 21120440012103 - 2³⁷ = 20983001058631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21120440012103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120440012107) 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 7 ways as a sum of consecutive naturals, for example, 5093023 + ... + 8257103.

It is an arithmetic number, because the mean of its divisors is an integer number (3520076029902).

Almost surely, 2^{21120440012103} is an apocalyptic number.

21120440012103 is a deficient number, since it is larger than the sum of its proper divisors (7040168227113).

21120440012103 is a wasteful number, since it uses less digits than its factorization.

21120440012103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5389105.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21120440012103 its reverse (30121004402112), we get a palindrome (51241444414215).

The spelling of 21120440012103 in words is "twenty-one trillion, one hundred twenty billion, four hundred forty million, twelve thousand, one hundred three".