1321003201 has 6 divisors (see below), whose sum is σ = 1536677250. Its totient is φ = 1132288416.

The previous prime is 1321003171. The next prime is 1321003219. The reversal of 1321003201 is 1023001231.

It can be written as a sum of positive squares in only one way, i.e., 870545025 + 450458176 = 29505^2 + 21224^2 .

It is not a de Polignac number, because 1321003201 - 2⁵ = 1321003169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321003001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13479576 + ... + 13479673.

It is an arithmetic number, because the mean of its divisors is an integer number (256112875).

Almost surely, 2^1321003201 is an apocalyptic number.

It is an amenable number.

1321003201 is a deficient number, since it is larger than the sum of its proper divisors (215674049).

1321003201 is an equidigital number, since it uses as much as digits as its factorization.

1321003201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26959263 (or 26959256 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1321003201 is about 36345.6077263815. The cubic root of 1321003201 is about 1097.2391372579.

Adding to 1321003201 its reverse (1023001231), we get a palindrome (2344004432).

The spelling of 1321003201 in words is "one billion, three hundred twenty-one million, three thousand, two hundred one".