21321203301 has 12 divisors (see below), whose sum is σ = 30843063628. Its totient is φ = 14193010944.

The previous prime is 21321203279. The next prime is 21321203311. The reversal of 21321203301 is 10330212312.

21321203301 is a `hidden beast` number, since 21 + 321 + 20 + 3 + 301 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10368534276 + 10952669025 = 101826^2 + 104655^2 .

It is not a de Polignac number, because 21321203301 - 2²⁶ = 21254094437 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 (21321203311) 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 11 ways as a sum of consecutive naturals, for example, 1753990 + ... + 1766103.

Almost surely, 2^21321203301 is an apocalyptic number.

It is an amenable number.

21321203301 is a deficient number, since it is larger than the sum of its proper divisors (9521860327).

21321203301 is a wasteful number, since it uses less digits than its factorization.

21321203301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3520772 (or 3520769 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21321203301 its reverse (10330212312), we get a palindrome (31651415613).

The spelling of 21321203301 in words is "twenty-one billion, three hundred twenty-one million, two hundred three thousand, three hundred one".