21113200311001 has 4 divisors (see below), whose sum is σ = 21195352841652. Its totient is φ = 21031047780352.

The previous prime is 21113200310989. The next prime is 21113200311017. The reversal of 21113200311001 is 10011300231112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15290438269401 + 5822762041600 = 3910299^2 + 2413040^2 .

It is a cyclic number.

It is not a de Polignac number, because 21113200311001 - 2¹¹ = 21113200308953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21113210311001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41076264940 + ... + 41076265453.

It is an arithmetic number, because the mean of its divisors is an integer number (5298838210413).

Almost surely, 2^{21113200311001} is an apocalyptic number.

It is an amenable number.

21113200311001 is a deficient number, since it is larger than the sum of its proper divisors (82152530651).

21113200311001 is an equidigital number, since it uses as much as digits as its factorization.

21113200311001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82152530650.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 21113200311001 its reverse (10011300231112), we get a palindrome (31124500542113).

The spelling of 21113200311001 in words is "twenty-one trillion, one hundred thirteen billion, two hundred million, three hundred eleven thousand, one".