21354550421411 has 8 divisors (see below), whose sum is σ = 22019604621840. Its totient is φ = 20699205041632.

The previous prime is 21354550421401. The next prime is 21354550421419. The reversal of 21354550421411 is 11412405545312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21354550421411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21354550421419) 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, 2427200696 + ... + 2427209493.

It is an arithmetic number, because the mean of its divisors is an integer number (2752450577730).

Almost surely, 2^{21354550421411} is an apocalyptic number.

21354550421411 is a deficient number, since it is larger than the sum of its proper divisors (665054200429).

21354550421411 is an equidigital number, since it uses as much as digits as its factorization.

21354550421411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4854410325.

The product of its (nonzero) digits is 96000, while the sum is 38.

Adding to 21354550421411 its reverse (11412405545312), we get a palindrome (32766955966723).

The spelling of 21354550421411 in words is "twenty-one trillion, three hundred fifty-four billion, five hundred fifty million, four hundred twenty-one thousand, four hundred eleven".