21403413211 has 4 divisors (see below), whose sum is σ = 21403855800. Its totient is φ = 21402970624.

The previous prime is 21403413197. The next prime is 21403413263. The reversal of 21403413211 is 11231430412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21403413211 - 2⁵ = 21403413179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21403419211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138406 + ... + 248923.

It is an arithmetic number, because the mean of its divisors is an integer number (5350963950).

Almost surely, 2^21403413211 is an apocalyptic number.

21403413211 is a deficient number, since it is larger than the sum of its proper divisors (442589).

21403413211 is an equidigital number, since it uses as much as digits as its factorization.

21403413211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442588.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21403413211 its reverse (11231430412), we get a palindrome (32634843623).

The spelling of 21403413211 in words is "twenty-one billion, four hundred three million, four hundred thirteen thousand, two hundred eleven".