1344111821 has 4 divisors (see below), whose sum is σ = 1447505052. Its totient is φ = 1240718592.

The previous prime is 1344111793. The next prime is 1344111829. The reversal of 1344111821 is 1281114431.

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 570493225 + 773618596 = 23885^2 + 27814^2 .

It is a cyclic number.

It is not a de Polignac number, because 1344111821 - 2¹⁴ = 1344095437 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 (1344111829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51696596 + ... + 51696621.

It is an arithmetic number, because the mean of its divisors is an integer number (361876263).

Almost surely, 2^1344111821 is an apocalyptic number.

It is an amenable number.

1344111821 is a deficient number, since it is larger than the sum of its proper divisors (103393231).

1344111821 is a wasteful number, since it uses less digits than its factorization.

1344111821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103393230.

The product of its digits is 768, while the sum is 26.

The square root of 1344111821 is about 36662.1306118452. The cubic root of 1344111821 is about 1103.6002754240.

The spelling of 1344111821 in words is "one billion, three hundred forty-four million, one hundred eleven thousand, eight hundred twenty-one".