1212641316 has 18 divisors (see below), whose sum is σ = 3065287862. Its totient is φ = 404213760.

The previous prime is 1212641299. The next prime is 1212641317. The reversal of 1212641316 is 6131462121.

It is a happy number.

1212641316 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 641 + 3 + 16 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1193978916 + 18662400 = 34554^2 + 4320^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×1212641316² = 2940997922540423712, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1212641316.

It is not an unprimeable number, because it can be changed into a prime (1212641317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16842205 + ... + 16842276.

Almost surely, 2^1212641316 is an apocalyptic number.

It is an amenable number.

1212641316 is an abundant number, since it is smaller than the sum of its proper divisors (1852646546).

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

1212641316 is a wasteful number, since it uses less digits than its factorization.

1212641316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33684491 (or 33684486 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 1212641316 is about 34822.9998133418. Note that the first 3 decimals coincide. The cubic root of 1212641316 is about 1066.3770430259.

The spelling of 1212641316 in words is "one billion, two hundred twelve million, six hundred forty-one thousand, three hundred sixteen".