34421221 has 4 divisors (see below), whose sum is σ = 35070732. Its totient is φ = 33771712.

The previous prime is 34421207. The next prime is 34421227. The reversal of 34421221 is 12212443.

34421221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12212443 = 17 ⋅718379.

It can be written as a sum of positive squares in 2 ways, for example, as 18533025 + 15888196 = 4305^2 + 3986^2 .

It is a cyclic number.

It is not a de Polignac number, because 34421221 - 2²¹ = 32324069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34421227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324676 + ... + 324781.

It is an arithmetic number, because the mean of its divisors is an integer number (8767683).

Almost surely, 2^34421221 is an apocalyptic number.

It is an amenable number.

34421221 is a deficient number, since it is larger than the sum of its proper divisors (649511).

34421221 is an equidigital number, since it uses as much as digits as its factorization.

34421221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649510.

The product of its digits is 384, while the sum is 19.

The square root of 34421221 is about 5866.9601157669. The cubic root of 34421221 is about 325.2935288978.

Adding to 34421221 its reverse (12212443), we get a palindrome (46633664).

The spelling of 34421221 in words is "thirty-four million, four hundred twenty-one thousand, two hundred twenty-one".