1225036820009 has 4 divisors (see below), whose sum is σ = 1225041452880. Its totient is φ = 1225032187140.

The previous prime is 1225036819891. The next prime is 1225036820027. The reversal of 1225036820009 is 9000286305221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1225036820009 - 2²⁰ = 1225035771433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225036820209) 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, 1894139 + ... + 2457200.

It is an arithmetic number, because the mean of its divisors is an integer number (306260363220).

Almost surely, 2^{1225036820009} is an apocalyptic number.

It is an amenable number.

1225036820009 is a deficient number, since it is larger than the sum of its proper divisors (4632871).

1225036820009 is an equidigital number, since it uses as much as digits as its factorization.

1225036820009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4632870.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 1225036820009 in words is "one trillion, two hundred twenty-five billion, thirty-six million, eight hundred twenty thousand, nine".