1340331520421 has 8 divisors (see below), whose sum is σ = 1419184730304. Its totient is φ = 1261479441600.

The previous prime is 1340331520417. The next prime is 1340331520433. The reversal of 1340331520421 is 1240251330431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1340331520421 - 2² = 1340331520417 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 (1340331526421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4082846 + ... + 4398896.

It is an arithmetic number, because the mean of its divisors is an integer number (177398091288).

Almost surely, 2^{1340331520421} is an apocalyptic number.

It is an amenable number.

1340331520421 is a deficient number, since it is larger than the sum of its proper divisors (78853209883).

1340331520421 is a wasteful number, since it uses less digits than its factorization.

1340331520421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565531.

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 1340331520421 its reverse (1240251330431), we get a palindrome (2580582850852).

The spelling of 1340331520421 in words is "one trillion, three hundred forty billion, three hundred thirty-one million, five hundred twenty thousand, four hundred twenty-one".