21322130113121 has 8 divisors (see below), whose sum is σ = 21742111034280. Its totient is φ = 20902803880192.

The previous prime is 21322130113033. The next prime is 21322130113147. The reversal of 21322130113121 is 12131103122312.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11824416982225 + 9497713130896 = 3438665^2 + 3081836^2 .

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 21322130113121 - 2¹⁸ = 21322129850977 is a prime.

It is a super-2 number, since 2×21322130113121² (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 (21322130113171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163606280 + ... + 163736553.

It is an arithmetic number, because the mean of its divisors is an integer number (2717763879285).

Almost surely, 2^{21322130113121} is an apocalyptic number.

It is an amenable number.

21322130113121 is a deficient number, since it is larger than the sum of its proper divisors (419980921159).

21322130113121 is a wasteful number, since it uses less digits than its factorization.

21322130113121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327344115.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 21322130113121 its reverse (12131103122312), we get a palindrome (33453233235433).

The spelling of 21322130113121 in words is "twenty-one trillion, three hundred twenty-two billion, one hundred thirty million, one hundred thirteen thousand, one hundred twenty-one".