21103143311 has 8 divisors (see below), whose sum is σ = 21189722400. Its totient is φ = 21016719360.

The previous prime is 21103143301. The next prime is 21103143323. The reversal of 21103143311 is 11334130112.

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-21103143311 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 (21103143301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237851 + ... + 314291.

It is an arithmetic number, because the mean of its divisors is an integer number (2648715300).

Almost surely, 2^21103143311 is an apocalyptic number.

21103143311 is a deficient number, since it is larger than the sum of its proper divisors (86579089).

21103143311 is an equidigital number, since it uses as much as digits as its factorization.

21103143311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77569.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21103143311 its reverse (11334130112), we get a palindrome (32437273423).

The spelling of 21103143311 in words is "twenty-one billion, one hundred three million, one hundred forty-three thousand, three hundred eleven".