1312121304166 has 8 divisors (see below), whose sum is σ = 1968421389984. Its totient is φ = 655980840840.

The previous prime is 1312121304163. The next prime is 1312121304181. The reversal of 1312121304166 is 6614031212131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312121304163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39885070 + ... + 39917953.

It is an arithmetic number, because the mean of its divisors is an integer number (246052673748).

Almost surely, 2^{1312121304166} is an apocalyptic number.

1312121304166 is a deficient number, since it is larger than the sum of its proper divisors (656300085818).

1312121304166 is an equidigital number, since it uses as much as digits as its factorization.

1312121304166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79811246.

The product of its (nonzero) digits is 5184, while the sum is 31.

Adding to 1312121304166 its reverse (6614031212131), we get a palindrome (7926152516297).

The spelling of 1312121304166 in words is "one trillion, three hundred twelve billion, one hundred twenty-one million, three hundred four thousand, one hundred sixty-six".