21410353211 has 4 divisors (see below), whose sum is σ = 23057303472. Its totient is φ = 19763402952.

The previous prime is 21410353187. The next prime is 21410353249. The reversal of 21410353211 is 11235301412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21410353211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21410353291) 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, 823475111 + ... + 823475136.

It is an arithmetic number, because the mean of its divisors is an integer number (5764325868).

Almost surely, 2^21410353211 is an apocalyptic number.

21410353211 is a deficient number, since it is larger than the sum of its proper divisors (1646950261).

21410353211 is a wasteful number, since it uses less digits than its factorization.

21410353211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646950260.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 21410353211 its reverse (11235301412), we get a palindrome (32645654623).

The spelling of 21410353211 in words is "twenty-one billion, four hundred ten million, three hundred fifty-three thousand, two hundred eleven".