21320003201 has 16 divisors (see below), whose sum is σ = 24739585920. Its totient is φ = 17994113280.

The previous prime is 21320003171. The next prime is 21320003231. The reversal of 21320003201 is 10230002312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21320003171) and next prime (21320003231).

It is a cyclic number.

It is not a de Polignac number, because 21320003201 - 2¹⁰ = 21320002177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21320003231) 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, 1333865 + ... + 1349753.

It is an arithmetic number, because the mean of its divisors is an integer number (1546224120).

Almost surely, 2^21320003201 is an apocalyptic number.

It is an amenable number.

21320003201 is a deficient number, since it is larger than the sum of its proper divisors (3419582719).

21320003201 is a wasteful number, since it uses less digits than its factorization.

21320003201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18824.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21320003201 its reverse (10230002312), we get a palindrome (31550005513).

The spelling of 21320003201 in words is "twenty-one billion, three hundred twenty million, three thousand, two hundred one".