1311023202 has 16 divisors (see below), whose sum is σ = 2622682272. Its totient is φ = 436901760.

The previous prime is 1311023179. The next prime is 1311023209. The reversal of 1311023202 is 2023201131.

It is not an unprimeable number, because it can be changed into a prime (1311023209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2802 + ... + 51282.

It is an arithmetic number, because the mean of its divisors is an integer number (163917642).

Almost surely, 2^1311023202 is an apocalyptic number.

1311023202 is an abundant number, since it is smaller than the sum of its proper divisors (1311659070).

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

1311023202 is a wasteful number, since it uses less digits than its factorization.

1311023202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52993.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1311023202 is about 36208.0543802066. The cubic root of 1311023202 is about 1094.4689854554.

Adding to 1311023202 its reverse (2023201131), we get a palindrome (3334224333).

The spelling of 1311023202 in words is "one billion, three hundred eleven million, twenty-three thousand, two hundred two".