1311303212 has 6 divisors (see below), whose sum is σ = 2294780628. Its totient is φ = 655651604.

The previous prime is 1311303187. The next prime is 1311303233. The reversal of 1311303212 is 2123031131.

It is a super-2 number, since 2×1311303212² = 3439032227603033888, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163912898 + ... + 163912905.

It is an arithmetic number, because the mean of its divisors is an integer number (382463438).

Almost surely, 2^1311303212 is an apocalyptic number.

It is an amenable number.

1311303212 is a deficient number, since it is larger than the sum of its proper divisors (983477416).

1311303212 is a wasteful number, since it uses less digits than its factorization.

1311303212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327825807 (or 327825805 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1311303212 is about 36211.9208548787. The cubic root of 1311303212 is about 1094.5468992672.

Adding to 1311303212 its reverse (2123031131), we get a palindrome (3434334343).

The spelling of 1311303212 in words is "one billion, three hundred eleven million, three hundred three thousand, two hundred twelve".