21113320213021 has 8 divisors (see below), whose sum is σ = 21117654849024. Its totient is φ = 21108985974720.

The previous prime is 21113320213001. The next prime is 21113320213031. The reversal of 21113320213021 is 12031202331112.

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 21113320213021 - 2¹³ = 21113320204829 is a prime.

It is a super-2 number, since 2×21113320213021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21113320212983 and 21113320213001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113320213001) 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, 120741765 + ... + 120916501.

It is an arithmetic number, because the mean of its divisors is an integer number (2639706856128).

Almost surely, 2^{21113320213021} is an apocalyptic number.

It is an amenable number.

21113320213021 is a deficient number, since it is larger than the sum of its proper divisors (4334636003).

21113320213021 is a wasteful number, since it uses less digits than its factorization.

21113320213021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198851.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21113320213021 its reverse (12031202331112), we get a palindrome (33144522544133).

The spelling of 21113320213021 in words is "twenty-one trillion, one hundred thirteen billion, three hundred twenty million, two hundred thirteen thousand, twenty-one".