1311320212 has 24 divisors (see below), whose sum is σ = 2387517440. Its totient is φ = 629506080.

The previous prime is 1311320191. The next prime is 1311320267. The reversal of 1311320212 is 2120231131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25887 + ... + 57382.

Almost surely, 2^1311320212 is an apocalyptic number.

It is an amenable number.

1311320212 is a deficient number, since it is larger than the sum of its proper divisors (1076197228).

1311320212 is a wasteful number, since it uses less digits than its factorization.

1311320212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83431 (or 83429 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1311320212 is about 36212.1555834502. The cubic root of 1311320212 is about 1094.5516292226.

Adding to 1311320212 its reverse (2120231131), we get a palindrome (3431551343).

The spelling of 1311320212 in words is "one billion, three hundred eleven million, three hundred twenty thousand, two hundred twelve".