21345410111 has 8 divisors (see below), whose sum is σ = 21751863120. Its totient is φ = 20939094592.

The previous prime is 21345410063. The next prime is 21345410173. The reversal of 21345410111 is 11101454312.

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-21345410111 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 (21345410011) 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, 311960 + ... + 374178.

It is an arithmetic number, because the mean of its divisors is an integer number (2718982890).

Almost surely, 2^21345410111 is an apocalyptic number.

21345410111 is a deficient number, since it is larger than the sum of its proper divisors (406453009).

21345410111 is an equidigital number, since it uses as much as digits as its factorization.

21345410111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68745.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 21345410111 its reverse (11101454312), we get a palindrome (32446864423).

The spelling of 21345410111 in words is "twenty-one billion, three hundred forty-five million, four hundred ten thousand, one hundred eleven".