21013303213011 has 4 divisors (see below), whose sum is σ = 28017737617352. Its totient is φ = 14008868808672.

The previous prime is 21013303212901. The next prime is 21013303213027. The reversal of 21013303213011 is 11031230331012.

It is a happy number.

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

It is not a de Polignac number, because 21013303213011 - 2¹⁰ = 21013303211987 is a prime.

It is a super-2 number, since 2×21013303213011² (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 (21013303213061) 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, 3502217202166 + ... + 3502217202171.

It is an arithmetic number, because the mean of its divisors is an integer number (7004434404338).

Almost surely, 2^{21013303213011} is an apocalyptic number.

21013303213011 is a deficient number, since it is larger than the sum of its proper divisors (7004434404341).

21013303213011 is an equidigital number, since it uses as much as digits as its factorization.

21013303213011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7004434404340.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 21013303213011 its reverse (11031230331012), we get a palindrome (32044533544023).

The spelling of 21013303213011 in words is "twenty-one trillion, thirteen billion, three hundred three million, two hundred thirteen thousand, eleven".