43220101 has 4 divisors (see below), whose sum is σ = 43479072. Its totient is φ = 42961132.

The previous prime is 43220077. The next prime is 43220113. The reversal of 43220101 is 10102234.

43220101 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 a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10102234 = 2 ⋅5051117.

It is a cyclic number.

It is not a de Polignac number, because 43220101 - 2¹⁹ = 42695813 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 (43220141) 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, 129235 + ... + 129568.

It is an arithmetic number, because the mean of its divisors is an integer number (10869768).

Almost surely, 2^43220101 is an apocalyptic number.

It is an amenable number.

43220101 is a deficient number, since it is larger than the sum of its proper divisors (258971).

43220101 is a wasteful number, since it uses less digits than its factorization.

43220101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258970.

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

The square root of 43220101 is about 6574.1996471053. The cubic root of 43220101 is about 350.9365420733.

Adding to 43220101 its reverse (10102234), we get a palindrome (53322335).

The spelling of 43220101 in words is "forty-three million, two hundred twenty thousand, one hundred one".