221220201001099 has 4 divisors (see below), whose sum is σ = 221220572213800. Its totient is φ = 221219829788400.

The previous prime is 221220201001081. The next prime is 221220201001223. The reversal of 221220201001099 is 990100102022122.

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

It is a cyclic number.

It is not a de Polignac number, because 221220201001099 - 2¹¹ = 221220200999051 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221220201001099.

It is not an unprimeable number, because it can be changed into a prime (221220201071099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184711002 + ... + 185904799.

It is an arithmetic number, because the mean of its divisors is an integer number (55305143053450).

Almost surely, 2^{221220201001099} is an apocalyptic number.

221220201001099 is a deficient number, since it is larger than the sum of its proper divisors (371212701).

221220201001099 is an equidigital number, since it uses as much as digits as its factorization.

221220201001099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371212700.

The product of its (nonzero) digits is 2592, while the sum is 31.

The spelling of 221220201001099 in words is "two hundred twenty-one trillion, two hundred twenty billion, two hundred one million, one thousand, ninety-nine".