2021101321 has 8 divisors (see below), whose sum is σ = 2213782920. Its totient is φ = 1836619008.

The previous prime is 2021101289. The next prime is 2021101331. The reversal of 2021101321 is 1231011202.

It can be written as a sum of positive squares in 4 ways, for example, as 234855625 + 1786245696 = 15325^2 + 42264^2 .

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 2021101321 - 2⁵ = 2021101289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021101331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2049306 + ... + 2050291.

It is an arithmetic number, because the mean of its divisors is an integer number (276722865).

Almost surely, 2^2021101321 is an apocalyptic number.

It is an amenable number.

2021101321 is a deficient number, since it is larger than the sum of its proper divisors (192681599).

2021101321 is a wasteful number, since it uses less digits than its factorization.

2021101321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4099643.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2021101321 is about 44956.6604742835. The cubic root of 2021101321 is about 1264.3365570254.

Adding to 2021101321 its reverse (1231011202), we get a palindrome (3252112523).

The spelling of 2021101321 in words is "two billion, twenty-one million, one hundred one thousand, three hundred twenty-one".