1321013201 has 2 divisors, whose sum is σ = 1321013202. Its totient is φ = 1321013200.

The previous prime is 1321013189. The next prime is 1321013207. The reversal of 1321013201 is 1023101231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 697012801 + 624000400 = 26401^2 + 24980^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321013201 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321013207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660506600 + 660506601.

It is an arithmetic number, because the mean of its divisors is an integer number (660506601).

Almost surely, 2^1321013201 is an apocalyptic number.

It is an amenable number.

1321013201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321013201 is an equidigital number, since it uses as much as digits as its factorization.

1321013201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1321013201 is about 36345.7452943257. The cubic root of 1321013201 is about 1097.2419059526.

Adding to 1321013201 its reverse (1023101231), we get a palindrome (2344114432).

The spelling of 1321013201 in words is "one billion, three hundred twenty-one million, thirteen thousand, two hundred one".