1311203013212 has 12 divisors (see below), whose sum is σ = 2356621632120. Its totient is φ = 637882546896.

The previous prime is 1311203013181. The next prime is 1311203013277. The reversal of 1311203013212 is 2123103021131.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4429739762 + ... + 4429740057.

It is an arithmetic number, because the mean of its divisors is an integer number (196385136010).

Almost surely, 2^{1311203013212} is an apocalyptic number.

It is an amenable number.

1311203013212 is a deficient number, since it is larger than the sum of its proper divisors (1045418618908).

1311203013212 is a wasteful number, since it uses less digits than its factorization.

1311203013212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8859479860 (or 8859479858 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1311203013212 its reverse (2123103021131), we get a palindrome (3434306034343).

The spelling of 1311203013212 in words is "one trillion, three hundred eleven billion, two hundred three million, thirteen thousand, two hundred twelve".