21011113213311 has 8 divisors (see below), whose sum is σ = 30169803588400. Its totient is φ = 12929915823552.

The previous prime is 21011113213291. The next prime is 21011113213333. The reversal of 21011113213311 is 11331231111012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21011113213311 - 2¹⁸ = 21011112951167 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 (21011113213351) 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, 269373246286 + ... + 269373246363.

It is an arithmetic number, because the mean of its divisors is an integer number (3771225448550).

Almost surely, 2^{21011113213311} is an apocalyptic number.

21011113213311 is a deficient number, since it is larger than the sum of its proper divisors (9158690375089).

21011113213311 is a wasteful number, since it uses less digits than its factorization.

21011113213311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538746492665.

The product of its (nonzero) digits is 108, while the sum is 21.

Adding to 21011113213311 its reverse (11331231111012), we get a palindrome (32342344324323).

The spelling of 21011113213311 in words is "twenty-one trillion, eleven billion, one hundred thirteen million, two hundred thirteen thousand, three hundred eleven".