21321000321303 has 16 divisors (see below), whose sum is σ = 29345766220800. Its totient is φ = 13755140240640.

The previous prime is 21321000321301. The next prime is 21321000321311. The reversal of 21321000321303 is 30312300012312.

It is not a de Polignac number, because 21321000321303 - 2¹ = 21321000321301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21321000321303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321000321301) 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, 901708 + ... + 6592046.

It is an arithmetic number, because the mean of its divisors is an integer number (1834110388800).

Almost surely, 2^{21321000321303} is an apocalyptic number.

21321000321303 is a deficient number, since it is larger than the sum of its proper divisors (8024765899497).

21321000321303 is a wasteful number, since it uses less digits than its factorization.

21321000321303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5730662.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21321000321303 its reverse (30312300012312), we get a palindrome (51633300333615).

The spelling of 21321000321303 in words is "twenty-one trillion, three hundred twenty-one billion, three hundred twenty-one thousand, three hundred three".