9921222001 has 16 divisors (see below), whose sum is σ = 10509903360. Its totient is φ = 9339321600.

The previous prime is 9921221923. The next prime is 9921222037. The reversal of 9921222001 is 1002221299.

It is a cyclic number.

It is not a de Polignac number, because 9921222001 - 2⁹ = 9921221489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9921222301) 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 15 ways as a sum of consecutive naturals, for example, 4494240 + ... + 4496446.

It is an arithmetic number, because the mean of its divisors is an integer number (656868960).

Almost surely, 2^9921222001 is an apocalyptic number.

It is an amenable number.

9921222001 is a deficient number, since it is larger than the sum of its proper divisors (588681359).

9921222001 is a wasteful number, since it uses less digits than its factorization.

9921222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3624.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 9921222001 is about 99605.3311876428. The cubic root of 9921222001 is about 2148.7623669155.

The spelling of 9921222001 in words is "nine billion, nine hundred twenty-one million, two hundred twenty-two thousand, one".