1212219363913 has 4 divisors (see below), whose sum is σ = 1212222024468. Its totient is φ = 1212216703360.

The previous prime is 1212219363911. The next prime is 1212219363917. The reversal of 1212219363913 is 3193639122121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1041322284304 + 170897079609 = 1020452^2 + 413397^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212219363913 - 2¹ = 1212219363911 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1212219363913.

It is not an unprimeable number, because it can be changed into a prime (1212219363911) 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, 454768 + ... + 1622113.

It is an arithmetic number, because the mean of its divisors is an integer number (303055506117).

Almost surely, 2^{1212219363913} is an apocalyptic number.

It is an amenable number.

1212219363913 is a deficient number, since it is larger than the sum of its proper divisors (2660555).

1212219363913 is an equidigital number, since it uses as much as digits as its factorization.

1212219363913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2660554.

The product of its digits is 104976, while the sum is 43.

The spelling of 1212219363913 in words is "one trillion, two hundred twelve billion, two hundred nineteen million, three hundred sixty-three thousand, nine hundred thirteen".