2221303421 has 2 divisors, whose sum is σ = 2221303422. Its totient is φ = 2221303420.

The previous prime is 2221303411. The next prime is 2221303477. The reversal of 2221303421 is 1243031222.

2221303421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1663824100 + 557479321 = 40790^2 + 23611^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221303421 - 2¹⁰ = 2221302397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2221303393 and 2221303402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221303411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110651710 + 1110651711.

It is an arithmetic number, because the mean of its divisors is an integer number (1110651711).

Almost surely, 2^2221303421 is an apocalyptic number.

It is an amenable number.

2221303421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221303421 is an equidigital number, since it uses as much as digits as its factorization.

2221303421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2221303421 is about 47130.7057129426. The cubic root of 2221303421 is about 1304.7760063384.

Adding to 2221303421 its reverse (1243031222), we get a palindrome (3464334643).

The spelling of 2221303421 in words is "two billion, two hundred twenty-one million, three hundred three thousand, four hundred twenty-one".