1321133201 has 6 divisors (see below), whose sum is σ = 1354143606. Its totient is φ = 1288908800.

The previous prime is 1321133197. The next prime is 1321133221. The reversal of 1321133201 is 1023311231.

It can be written as a sum of positive squares in 3 ways, for example, as 18284176 + 1302849025 = 4276^2 + 36095^2 .

It is not a de Polignac number, because 1321133201 - 2² = 1321133197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1321133201.

It is not an unprimeable number, because it can be changed into a prime (1321133221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 391280 + ... + 394641.

It is an arithmetic number, because the mean of its divisors is an integer number (225690601).

Almost surely, 2^1321133201 is an apocalyptic number.

It is an amenable number.

1321133201 is a deficient number, since it is larger than the sum of its proper divisors (33010405).

1321133201 is an frugal number, since it uses more digits than its factorization.

1321133201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786003 (or 785962 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1321133201 is about 36347.3960690446. The cubic root of 1321133201 is about 1097.2751291992.

Adding to 1321133201 its reverse (1023311231), we get a palindrome (2344444432).

The spelling of 1321133201 in words is "one billion, three hundred twenty-one million, one hundred thirty-three thousand, two hundred one".