2103223021 has 2 divisors, whose sum is σ = 2103223022. Its totient is φ = 2103223020.

The previous prime is 2103223019. The next prime is 2103223033. The reversal of 2103223021 is 1203223012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1680098121 + 423124900 = 40989^2 + 20570^2 .

It is a cyclic number.

It is not a de Polignac number, because 2103223021 - 2¹ = 2103223019 is a prime.

Together with 2103223019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2103222986 and 2103223004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2103223061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051611510 + 1051611511.

It is an arithmetic number, because the mean of its divisors is an integer number (1051611511).

Almost surely, 2^2103223021 is an apocalyptic number.

It is an amenable number.

2103223021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2103223021 is an equidigital number, since it uses as much as digits as its factorization.

2103223021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 2103223021 is about 45860.9095090797. The cubic root of 2103223021 is about 1281.2339624215.

Adding to 2103223021 its reverse (1203223012), we get a palindrome (3306446033).

Subtracting from 2103223021 its reverse (1203223012), we obtain a palindrome (900000009).

The spelling of 2103223021 in words is "two billion, one hundred three million, two hundred twenty-three thousand, twenty-one".