9442020221 has 4 divisors (see below), whose sum is σ = 9486769344. Its totient is φ = 9397271100.

The previous prime is 9442020199. The next prime is 9442020233. The reversal of 9442020221 is 1220202449.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 9442020221 - 2¹⁸ = 9441758077 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 (9442023221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22374245 + ... + 22374666.

It is an arithmetic number, because the mean of its divisors is an integer number (2371692336).

Almost surely, 2^9442020221 is an apocalyptic number.

It is an amenable number.

9442020221 is a deficient number, since it is larger than the sum of its proper divisors (44749123).

9442020221 is a wasteful number, since it uses less digits than its factorization.

9442020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44749122.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 9442020221 is about 97170.0582535587. The cubic root of 9442020221 is about 2113.5943632937.

The spelling of 9442020221 in words is "nine billion, four hundred forty-two million, twenty thousand, two hundred twenty-one".