1320200001 has 12 divisors (see below), whose sum is σ = 1917611280. Its totient is φ = 875215320.

The previous prime is 1320199999. The next prime is 1320200033. The reversal of 1320200001 is 1000020231.

It is a happy number.

It is not a de Polignac number, because 1320200001 - 2¹ = 1320199999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1320200201) 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, 408135 + ... + 411356.

It is an arithmetic number, because the mean of its divisors is an integer number (159800940).

Almost surely, 2^1320200001 is an apocalyptic number.

It is an amenable number.

1320200001 is a deficient number, since it is larger than the sum of its proper divisors (597411279).

1320200001 is a wasteful number, since it uses less digits than its factorization.

1320200001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819676 (or 819673 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1320200001 is about 36334.5565680937. The cubic root of 1320200001 is about 1097.0167100520.

Adding to 1320200001 its reverse (1000020231), we get a palindrome (2320220232).

The spelling of 1320200001 in words is "one billion, three hundred twenty million, two hundred thousand, one".