1213045016399 has 4 divisors (see below), whose sum is σ = 1213984634280. Its totient is φ = 1212105398520.

The previous prime is 1213045016389. The next prime is 1213045016401. The reversal of 1213045016399 is 9936105403121.

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

It is a cyclic number.

It is not a de Polignac number, because 1213045016399 - 2⁴⁰ = 113533388623 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 (1213045016389) 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, 469807004 + ... + 469809585.

It is an arithmetic number, because the mean of its divisors is an integer number (303496158570).

Almost surely, 2^{1213045016399} is an apocalyptic number.

1213045016399 is a deficient number, since it is larger than the sum of its proper divisors (939617881).

1213045016399 is an equidigital number, since it uses as much as digits as its factorization.

1213045016399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939617880.

The product of its (nonzero) digits is 174960, while the sum is 44.

The spelling of 1213045016399 in words is "one trillion, two hundred thirteen billion, forty-five million, sixteen thousand, three hundred ninety-nine".