21013303111 has 8 divisors (see below), whose sum is σ = 21757290480. Its totient is φ = 20270608512.

The previous prime is 21013303039. The next prime is 21013303153. The reversal of 21013303111 is 11130331012.

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 21013303111 - 2¹⁹ = 21012778823 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 (21013303811) 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, 290050 + ... + 355183.

It is an arithmetic number, because the mean of its divisors is an integer number (2719661310).

Almost surely, 2^21013303111 is an apocalyptic number.

21013303111 is a deficient number, since it is larger than the sum of its proper divisors (743987369).

21013303111 is a wasteful number, since it uses less digits than its factorization.

21013303111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646385.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 21013303111 its reverse (11130331012), we get a palindrome (32143634123).

The spelling of 21013303111 in words is "twenty-one billion, thirteen million, three hundred three thousand, one hundred eleven".