1340044444421 has 4 divisors (see below), whose sum is σ = 1340068507200. Its totient is φ = 1340020381644.

The previous prime is 1340044444339. The next prime is 1340044444441. The reversal of 1340044444421 is 1244444400431.

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 1340044444421 - 2¹⁸ = 1340044182277 is a prime.

It is a super-2 number, since 2×1340044444421² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340044444441) 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, 11947661 + ... + 12059298.

It is an arithmetic number, because the mean of its divisors is an integer number (335017126800).

Almost surely, 2^{1340044444421} is an apocalyptic number.

It is an amenable number.

1340044444421 is a deficient number, since it is larger than the sum of its proper divisors (24062779).

1340044444421 is an equidigital number, since it uses as much as digits as its factorization.

1340044444421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24062778.

The product of its (nonzero) digits is 98304, while the sum is 35.

Adding to 1340044444421 its reverse (1244444400431), we get a palindrome (2584488844852).

The spelling of 1340044444421 in words is "one trillion, three hundred forty billion, forty-four million, four hundred forty-four thousand, four hundred twenty-one".