1311203012 has 12 divisors (see below), whose sum is σ = 2622406080. Its totient is φ = 561944136.

The previous prime is 1311203009. The next prime is 1311203017. The reversal of 1311203012 is 2103021131.

1311203012 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (1311203017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23414312 + ... + 23414367.

It is an arithmetic number, because the mean of its divisors is an integer number (218533840).

Almost surely, 2^1311203012 is an apocalyptic number.

It is an amenable number.

1311203012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1311203012 is a wasteful number, since it uses less digits than its factorization.

1311203012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46828690 (or 46828688 counting only the distinct ones).

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

The square root of 1311203012 is about 36210.5373061489. The cubic root of 1311203012 is about 1094.5190195234.

Adding to 1311203012 its reverse (2103021131), we get a palindrome (3414224143).

The spelling of 1311203012 in words is "one billion, three hundred eleven million, two hundred three thousand, twelve".