21341042213413 has 4 divisors (see below), whose sum is σ = 22982660845228. Its totient is φ = 19699423581600.

The previous prime is 21341042213399. The next prime is 21341042213441. The reversal of 21341042213413 is 31431224014312.

It is a happy number.

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 10876289518084 + 10464752695329 = 3297922^2 + 3234927^2 .

It is a cyclic number.

It is not a de Polignac number, because 21341042213413 - 2²¹ = 21341040116261 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 (21341042213213) 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, 820809315888 + ... + 820809315913.

It is an arithmetic number, because the mean of its divisors is an integer number (5745665211307).

Almost surely, 2^{21341042213413} is an apocalyptic number.

It is an amenable number.

21341042213413 is a deficient number, since it is larger than the sum of its proper divisors (1641618631815).

21341042213413 is a wasteful number, since it uses less digits than its factorization.

21341042213413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641618631814.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 21341042213413 its reverse (31431224014312), we get a palindrome (52772266227725).

The spelling of 21341042213413 in words is "twenty-one trillion, three hundred forty-one billion, forty-two million, two hundred thirteen thousand, four hundred thirteen".