34001221 has 4 divisors (see below), whose sum is σ = 34019244. Its totient is φ = 33983200.

The previous prime is 34001183. The next prime is 34001239. The reversal of 34001221 is 12210043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12210043 = 199 ⋅61357.

It can be written as a sum of positive squares in 2 ways, for example, as 32148900 + 1852321 = 5670^2 + 1361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-34001221 is a prime.

It is a Duffinian number.

34001221 is a modest number, since divided by 1221 gives 34 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34001251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5800 + ... + 10081.

It is an arithmetic number, because the mean of its divisors is an integer number (8504811).

Almost surely, 2^34001221 is an apocalyptic number.

It is an amenable number.

34001221 is a deficient number, since it is larger than the sum of its proper divisors (18023).

34001221 is a wasteful number, since it uses less digits than its factorization.

34001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18022.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 34001221 is about 5831.0565937916. The cubic root of 34001221 is about 323.9650580872.

Adding to 34001221 its reverse (12210043), we get a palindrome (46211264).

The spelling of 34001221 in words is "thirty-four million, one thousand, two hundred twenty-one".