1320100002 has 24 divisors (see below), whose sum is σ = 3080233884. Its totient is φ = 406184544.

The previous prime is 1320099971. The next prime is 1320100003. The reversal of 1320100002 is 2000010231.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 915728121 + 404371881 = 30261^2 + 20109^2 .

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 (1320100003) 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, 2820493 + ... + 2820960.

Almost surely, 2^1320100002 is an apocalyptic number.

1320100002 is an abundant number, since it is smaller than the sum of its proper divisors (1760133882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1320100002 is a wasteful number, since it uses less digits than its factorization.

1320100002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5641474 (or 5641471 counting only the distinct ones).

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

The square root of 1320100002 is about 36333.1804553359. The cubic root of 1320100002 is about 1096.9890113842.

Adding to 1320100002 its reverse (2000010231), we get a palindrome (3320110233).

The spelling of 1320100002 in words is "one billion, three hundred twenty million, one hundred thousand, two".