21011303033011 has 8 divisors (see below), whose sum is σ = 22146224389200. Its totient is φ = 19879288007040.

The previous prime is 21011303032969. The next prime is 21011303033027. The reversal of 21011303033011 is 11033030311012.

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

It is not a de Polignac number, because 21011303033011 - 2¹⁵ = 21011303000243 is a prime.

It is a super-2 number, since 2×21011303033011² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21011303033011.

It is not an unprimeable number, because it can be changed into a prime (21011303033111) 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, 726567706 + ... + 726596623.

It is an arithmetic number, because the mean of its divisors is an integer number (2768278048650).

Almost surely, 2^{21011303033011} is an apocalyptic number.

21011303033011 is a deficient number, since it is larger than the sum of its proper divisors (1134921356189).

21011303033011 is a wasteful number, since it uses less digits than its factorization.

21011303033011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1453165109.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 21011303033011 its reverse (11033030311012), we get a palindrome (32044333344023).

The spelling of 21011303033011 in words is "twenty-one trillion, eleven billion, three hundred three million, thirty-three thousand, eleven".