9940122221 has 4 divisors (see below), whose sum is σ = 10372301472. Its totient is φ = 9507942972.

The previous prime is 9940122209. The next prime is 9940122229. The reversal of 9940122221 is 1222210499.

9940122221 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.

It is a cyclic number.

It is not a de Polignac number, because 9940122221 - 2¹⁴ = 9940105837 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 (9940122229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216089591 + ... + 216089636.

It is an arithmetic number, because the mean of its divisors is an integer number (2593075368).

Almost surely, 2^9940122221 is an apocalyptic number.

It is an amenable number.

9940122221 is a deficient number, since it is larger than the sum of its proper divisors (432179251).

9940122221 is a wasteful number, since it uses less digits than its factorization.

9940122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432179250.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 9940122221 is about 99700.1615896384. The cubic root of 9940122221 is about 2150.1259865599.

The spelling of 9940122221 in words is "nine billion, nine hundred forty million, one hundred twenty-two thousand, two hundred twenty-one".