21110001003321 has 16 divisors (see below), whose sum is σ = 28568434579200. Its totient is φ = 13863920285648.

The previous prime is 21110001003281. The next prime is 21110001003431. The reversal of 21110001003321 is 12330010001112.

It is a happy number.

It is not a de Polignac number, because 21110001003321 - 2⁷ = 21110001003193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21110001003321.

It is not an unprimeable number, because it can be changed into a prime (21110001003121) 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, 183638751 + ... + 183753668.

It is an arithmetic number, because the mean of its divisors is an integer number (1785527161200).

Almost surely, 2^{21110001003321} is an apocalyptic number.

It is an amenable number.

21110001003321 is a deficient number, since it is larger than the sum of its proper divisors (7458433575879).

21110001003321 is a wasteful number, since it uses less digits than its factorization.

21110001003321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367392708.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21110001003321 its reverse (12330010001112), we get a palindrome (33440011004433).

The spelling of 21110001003321 in words is "twenty-one trillion, one hundred ten billion, one million, three thousand, three hundred twenty-one".