1312123012033 has 4 divisors (see below), whose sum is σ = 1347585796180. Its totient is φ = 1276660227888.

The previous prime is 1312123012019. The next prime is 1312123012061. The reversal of 1312123012033 is 3302103212131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1040049149584 + 272073862449 = 1019828^2 + 521607^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312123012033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312123011995 and 1312123012013.

It is not an unprimeable number, because it can be changed into a prime (1312123012433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17731392018 + ... + 17731392091.

It is an arithmetic number, because the mean of its divisors is an integer number (336896449045).

Almost surely, 2^{1312123012033} is an apocalyptic number.

It is an amenable number.

1312123012033 is a deficient number, since it is larger than the sum of its proper divisors (35462784147).

1312123012033 is an equidigital number, since it uses as much as digits as its factorization.

1312123012033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35462784146.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 1312123012033 its reverse (3302103212131), we get a palindrome (4614226224164).

The spelling of 1312123012033 in words is "one trillion, three hundred twelve billion, one hundred twenty-three million, twelve thousand, thirty-three".