21013341213 has 32 divisors (see below), whose sum is σ = 30829132800. Its totient is φ = 12672101376.

The previous prime is 21013341169. The next prime is 21013341233. The reversal of 21013341213 is 31214331012.

It is not a de Polignac number, because 21013341213 - 2¹⁰ = 21013340189 is a prime.

It is a super-2 number, since 2×21013341213² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21013341213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013341233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 742558 + ... + 770336.

It is an arithmetic number, because the mean of its divisors is an integer number (963410400).

Almost surely, 2^21013341213 is an apocalyptic number.

21013341213 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21013341213 is a deficient number, since it is larger than the sum of its proper divisors (9815791587).

21013341213 is a wasteful number, since it uses less digits than its factorization.

21013341213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28401.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21013341213 its reverse (31214331012), we get a palindrome (52227672225).

The spelling of 21013341213 in words is "twenty-one billion, thirteen million, three hundred forty-one thousand, two hundred thirteen".