4421340421 has 2 divisors, whose sum is σ = 4421340422. Its totient is φ = 4421340420.

The previous prime is 4421340403. The next prime is 4421340449. The reversal of 4421340421 is 1240431244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4230071521 + 191268900 = 65039^2 + 13830^2 .

It is a cyclic number.

It is not a de Polignac number, because 4421340421 - 2²³ = 4412951813 is a prime.

It is a super-2 number, since 2×4421340421² = 39096502236736914482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4421340461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2210670210 + 2210670211.

It is an arithmetic number, because the mean of its divisors is an integer number (2210670211).

Almost surely, 2^4421340421 is an apocalyptic number.

It is an amenable number.

4421340421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4421340421 is an equidigital number, since it uses as much as digits as its factorization.

4421340421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 4421340421 is about 66493.1607084518. The cubic root of 4421340421 is about 1641.2874607989.

Adding to 4421340421 its reverse (1240431244), we get a palindrome (5661771665).

The spelling of 4421340421 in words is "four billion, four hundred twenty-one million, three hundred forty thousand, four hundred twenty-one".