21011133313303 has 12 divisors (see below), whose sum is σ = 25504197315120. Its totient is φ = 17226519237312.

The previous prime is 21011133313229. The next prime is 21011133313343. The reversal of 21011133313303 is 30331333111012.

It is not a de Polignac number, because 21011133313303 - 2¹³ = 21011133305111 is a prime.

It is a super-2 number, since 2×21011133313303² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011133313343) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9321708418 + ... + 9321710671.

It is an arithmetic number, because the mean of its divisors is an integer number (2125349776260).

Almost surely, 2^{21011133313303} is an apocalyptic number.

21011133313303 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21011133313303 is a deficient number, since it is larger than the sum of its proper divisors (4493064001817).

21011133313303 is a wasteful number, since it uses less digits than its factorization.

21011133313303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18643419126 (or 18643419119 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 25.

Adding to 21011133313303 its reverse (30331333111012), we get a palindrome (51342466424315).

The spelling of 21011133313303 in words is "twenty-one trillion, eleven billion, one hundred thirty-three million, three hundred thirteen thousand, three hundred three".