1212845216966 has 4 divisors (see below), whose sum is σ = 1819267825452. Its totient is φ = 606422608482.

The previous prime is 1212845216959. The next prime is 1212845217013. The reversal of 1212845216966 is 6696125482121.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1212845216966² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303211304240 + ... + 303211304243.

It is an arithmetic number, because the mean of its divisors is an integer number (454816956363).

Almost surely, 2^{1212845216966} is an apocalyptic number.

1212845216966 is a deficient number, since it is larger than the sum of its proper divisors (606422608486).

1212845216966 is an equidigital number, since it uses as much as digits as its factorization.

1212845216966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606422608485.

The product of its digits is 2488320, while the sum is 53.

The spelling of 1212845216966 in words is "one trillion, two hundred twelve billion, eight hundred forty-five million, two hundred sixteen thousand, nine hundred sixty-six".