2101022321 has 2 divisors, whose sum is σ = 2101022322. Its totient is φ = 2101022320.

The previous prime is 2101022309. The next prime is 2101022323. The reversal of 2101022321 is 1232201012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1891815025 + 209207296 = 43495^2 + 14464^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101022321 - 2¹⁴ = 2101005937 is a prime.

Together with 2101022323, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2101022296 and 2101022305.

It is not a weakly prime, because it can be changed into another prime (2101022323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050511160 + 1050511161.

It is an arithmetic number, because the mean of its divisors is an integer number (1050511161).

Almost surely, 2^2101022321 is an apocalyptic number.

It is an amenable number.

2101022321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101022321 is an equidigital number, since it uses as much as digits as its factorization.

2101022321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2101022321 is about 45836.9100289276. The cubic root of 2101022321 is about 1280.7869349221.

Adding to 2101022321 its reverse (1232201012), we get a palindrome (3333223333).

The spelling of 2101022321 in words is "two billion, one hundred one million, twenty-two thousand, three hundred twenty-one".