1211320312 has 32 divisors (see below), whose sum is σ = 2420187120. Its totient is φ = 566392320.

The previous prime is 1211320301. The next prime is 1211320333. The reversal of 1211320312 is 2130231121.

It is a zygodrome in base 5.

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, 7014 + ... + 49717.

Almost surely, 2^1211320312 is an apocalyptic number.

It is an amenable number.

1211320312 is a deficient number, since it is larger than the sum of its proper divisors (1208866808).

1211320312 is a wasteful number, since it uses less digits than its factorization.

1211320312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56911 (or 56907 counting only the distinct ones).

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

The square root of 1211320312 is about 34804.0272382378. The cubic root of 1211320312 is about 1065.9896791907.

Adding to 1211320312 its reverse (2130231121), we get a palindrome (3341551433).

The spelling of 1211320312 in words is "one billion, two hundred eleven million, three hundred twenty thousand, three hundred twelve".