1212104666573 has 16 divisors (see below), whose sum is σ = 1263617696880. Its totient is φ = 1161806131200.

The previous prime is 1212104666561. The next prime is 1212104666579. The reversal of 1212104666573 is 3756664012121.

It can be written as a sum of positive squares in 8 ways, for example, as 94183313449 + 1117921353124 = 306893^2 + 1057318^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212104666573 - 2¹⁰ = 1212104665549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212104666579) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 484988 + ... + 1630773.

It is an arithmetic number, because the mean of its divisors is an integer number (78976106055).

Almost surely, 2^{1212104666573} is an apocalyptic number.

It is an amenable number.

1212104666573 is a deficient number, since it is larger than the sum of its proper divisors (51513030307).

1212104666573 is a wasteful number, since it uses less digits than its factorization.

1212104666573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2116048.

The product of its (nonzero) digits is 362880, while the sum is 44.

Adding to 1212104666573 its reverse (3756664012121), we get a palindrome (4968768678694).

The spelling of 1212104666573 in words is "one trillion, two hundred twelve billion, one hundred four million, six hundred sixty-six thousand, five hundred seventy-three".