21001322113013 has 8 divisors (see below), whose sum is σ = 23051088634656. Its totient is φ = 18974981494800.

The previous prime is 21001322112989. The next prime is 21001322113021. The reversal of 21001322113013 is 31031122310012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21001322113013 - 2¹⁸ = 21001321850869 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001322113313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5856473978 + ... + 5856477563.

It is an arithmetic number, because the mean of its divisors is an integer number (2881386079332).

Almost surely, 2^{21001322113013} is an apocalyptic number.

It is an amenable number.

21001322113013 is a deficient number, since it is larger than the sum of its proper divisors (2049766521643).

21001322113013 is a wasteful number, since it uses less digits than its factorization.

21001322113013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11712951715.

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

Adding to 21001322113013 its reverse (31031122310012), we get a palindrome (52032444423025).

The spelling of 21001322113013 in words is "twenty-one trillion, one billion, three hundred twenty-two million, one hundred thirteen thousand, thirteen".