1212445404509 has 8 divisors (see below), whose sum is σ = 1220593701888. Its totient is φ = 1204315861840.

The previous prime is 1212445404491. The next prime is 1212445404557. The reversal of 1212445404509 is 9054045442121.

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

It is a cyclic number.

It is not a de Polignac number, because 1212445404509 - 2²⁰ = 1212444355933 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 (1212445464509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4558937 + ... + 4817550.

It is an arithmetic number, because the mean of its divisors is an integer number (152574212736).

Almost surely, 2^{1212445404509} is an apocalyptic number.

It is an amenable number.

1212445404509 is a deficient number, since it is larger than the sum of its proper divisors (8148297379).

1212445404509 is an equidigital number, since it uses as much as digits as its factorization.

1212445404509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9377355.

The product of its (nonzero) digits is 230400, while the sum is 41.

The spelling of 1212445404509 in words is "one trillion, two hundred twelve billion, four hundred forty-five million, four hundred four thousand, five hundred nine".