21033212110013 has 4 divisors (see below), whose sum is σ = 21035326223100. Its totient is φ = 21031097996928.

The previous prime is 21033212109953. The next prime is 21033212110021. The reversal of 21033212110013 is 31001121233012.

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 3195074025529 + 17838138084484 = 1787477^2 + 4223522^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21033212110013 is a prime.

It is a super-2 number, since 2×21033212110013² (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 (21033212119013) 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, 1057041620 + ... + 1057061517.

It is an arithmetic number, because the mean of its divisors is an integer number (5258831555775).

Almost surely, 2^{21033212110013} is an apocalyptic number.

It is an amenable number.

21033212110013 is a deficient number, since it is larger than the sum of its proper divisors (2114113087).

21033212110013 is an equidigital number, since it uses as much as digits as its factorization.

21033212110013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2114113086.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21033212110013 its reverse (31001121233012), we get a palindrome (52034333343025).

The spelling of 21033212110013 in words is "twenty-one trillion, thirty-three billion, two hundred twelve million, one hundred ten thousand, thirteen".