9810423221 has 4 divisors (see below), whose sum is σ = 9848596332. Its totient is φ = 9772250112.

The previous prime is 9810423199. The next prime is 9810423241. The reversal of 9810423221 is 1223240189.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7053648196 + 2756775025 = 83986^2 + 52505^2 .

It is a cyclic number.

It is not a de Polignac number, because 9810423221 - 2⁶ = 9810423157 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 (9810423241) 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, 19086170 + ... + 19086683.

It is an arithmetic number, because the mean of its divisors is an integer number (2462149083).

Almost surely, 2^9810423221 is an apocalyptic number.

It is an amenable number.

9810423221 is a deficient number, since it is larger than the sum of its proper divisors (38173111).

9810423221 is a wasteful number, since it uses less digits than its factorization.

9810423221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38173110.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 9810423221 is about 99047.5805913501. The cubic root of 9810423221 is about 2140.7333804720.

The spelling of 9810423221 in words is "nine billion, eight hundred ten million, four hundred twenty-three thousand, two hundred twenty-one".