21403213553411 has 8 divisors (see below), whose sum is σ = 21864494648640. Its totient is φ = 20942178023808.

The previous prime is 21403213553399. The next prime is 21403213553441. The reversal of 21403213553411 is 11435531230412.

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 21403213553411 - 2¹⁸ = 21403213291267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21403213553441) 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, 61215206 + ... + 61563851.

It is an arithmetic number, because the mean of its divisors is an integer number (2733061831080).

Almost surely, 2^{21403213553411} is an apocalyptic number.

21403213553411 is a deficient number, since it is larger than the sum of its proper divisors (461281095229).

21403213553411 is a wasteful number, since it uses less digits than its factorization.

21403213553411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122782813.

The product of its (nonzero) digits is 43200, while the sum is 35.

Adding to 21403213553411 its reverse (11435531230412), we get a palindrome (32838744783823).

The spelling of 21403213553411 in words is "twenty-one trillion, four hundred three billion, two hundred thirteen million, five hundred fifty-three thousand, four hundred eleven".