21040011033011 has 32 divisors (see below), whose sum is σ = 21696131251200. Its totient is φ = 20393381664000.

The previous prime is 21040011032959. The next prime is 21040011033029. The reversal of 21040011033011 is 11033011004012.

It is not a de Polignac number, because 21040011033011 - 2¹⁰ = 21040011031987 is a prime.

It is a super-2 number, since 2×21040011033011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21040011033071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7010998511 + ... + 7011001511.

It is an arithmetic number, because the mean of its divisors is an integer number (678004101600).

Almost surely, 2^{21040011033011} is an apocalyptic number.

21040011033011 is a deficient number, since it is larger than the sum of its proper divisors (656120218189).

21040011033011 is a wasteful number, since it uses less digits than its factorization.

21040011033011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5499.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21040011033011 its reverse (11033011004012), we get a palindrome (32073022037023).

The spelling of 21040011033011 in words is "twenty-one trillion, forty billion, eleven million, thirty-three thousand, eleven".