2101332221321 has 4 divisors (see below), whose sum is σ = 2101335509652.
Its totient is φ = 2101328932992.
The previous prime is 2101332221311. The next prime is 2101332221347. The reversal of 2101332221321 is 1231222331012.
Adding to 2101332221321 its reverse (1231222331012), we get a palindrome (3332554552333).
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 871870387600 + 1229461833721 = 933740^2 + 1108811^2
It is a cyclic number.
It is not a de Polignac number, because 2101332221321 - 234 = 2084152352137 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (2101332221311) 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, 341696 + ... + 2078321.
It is an arithmetic number, because the mean of its divisors is an integer number (525333877413).
Almost surely, 22101332221321 is an apocalyptic number.
It is an amenable number.
2101332221321 is a deficient number, since it is larger than the sum of its proper divisors (3288331).
2101332221321 is an equidigital number, since it uses as much as digits as its factorization.
2101332221321 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3288330.
The product of its (nonzero) digits is 864, while the sum is 23.
The spelling of 2101332221321 in words is "two trillion, one hundred one billion, three hundred thirty-two million, two hundred twenty-one thousand, three hundred twenty-one".