1331228018965 has 32 divisors (see below), whose sum is σ = 1733001580800. Its totient is φ = 975857642496.

The previous prime is 1331228018947. The next prime is 1331228018971. The reversal of 1331228018965 is 5698108221331.

It is a cyclic number.

It is not a de Polignac number, because 1331228018965 - 2⁷ = 1331228018837 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5482014 + ... + 5719696.

It is an arithmetic number, because the mean of its divisors is an integer number (54156299400).

Almost surely, 2^{1331228018965} is an apocalyptic number.

It is an amenable number.

1331228018965 is a deficient number, since it is larger than the sum of its proper divisors (401773561835).

1331228018965 is a wasteful number, since it uses less digits than its factorization.

1331228018965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238333.

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 1331228018965 in words is "one trillion, three hundred thirty-one billion, two hundred twenty-eight million, eighteen thousand, nine hundred sixty-five".