2101313321 has 4 divisors (see below), whose sum is σ = 2101583700. Its totient is φ = 2101042944.

The previous prime is 2101313317. The next prime is 2101313329. The reversal of 2101313321 is 1233131012.

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 1857610000 + 243703321 = 43100^2 + 15611^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101313321 - 2² = 2101313317 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2101313321.

It is not an unprimeable number, because it can be changed into a prime (2101313329) 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, 123176 + ... + 139193.

It is an arithmetic number, because the mean of its divisors is an integer number (525395925).

Almost surely, 2^2101313321 is an apocalyptic number.

It is an amenable number.

2101313321 is a deficient number, since it is larger than the sum of its proper divisors (270379).

2101313321 is an equidigital number, since it uses as much as digits as its factorization.

2101313321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270378.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 2101313321 is about 45840.0842167638. The cubic root of 2101313321 is about 1280.8460635644.

Adding to 2101313321 its reverse (1233131012), we get a palindrome (3334444333).

The spelling of 2101313321 in words is "two billion, one hundred one million, three hundred thirteen thousand, three hundred twenty-one".