10001221099 has 8 divisors (see below), whose sum is σ = 10145786112. Its totient is φ = 9856759080.

The previous prime is 10001221093. The next prime is 10001221103. The reversal of 10001221099 is 99012210001.

10001221099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10001221099 - 2²¹ = 9999123947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10001221093) 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 7 ways as a sum of consecutive naturals, for example, 181852 + ... + 230374.

It is an arithmetic number, because the mean of its divisors is an integer number (1268223264).

Almost surely, 2^10001221099 is an apocalyptic number.

10001221099 is a deficient number, since it is larger than the sum of its proper divisors (144565013).

10001221099 is an equidigital number, since it uses as much as digits as its factorization.

10001221099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51497.

The product of its (nonzero) digits is 324, while the sum is 25.

The spelling of 10001221099 in words is "ten billion, one million, two hundred twenty-one thousand, ninety-nine".