21201313203 has 12 divisors (see below), whose sum is σ = 34998993328. Its totient is φ = 12115036080.

The previous prime is 21201313201. The next prime is 21201313213. The reversal of 21201313203 is 30231310212.

21201313203 is a `hidden beast` number, since 212 + 0 + 131 + 320 + 3 = 666.

It is not a de Polignac number, because 21201313203 - 2¹ = 21201313201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21201313201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 168264328 + ... + 168264453.

Almost surely, 2^21201313203 is an apocalyptic number.

21201313203 is a deficient number, since it is larger than the sum of its proper divisors (13797680125).

21201313203 is a wasteful number, since it uses less digits than its factorization.

21201313203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336528794 (or 336528791 counting only the distinct ones).

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

Adding to 21201313203 its reverse (30231310212), we get a palindrome (51432623415).

The spelling of 21201313203 in words is "twenty-one billion, two hundred one million, three hundred thirteen thousand, two hundred three".