221001010120309 has 4 divisors (see below), whose sum is σ = 222484238376300. Its totient is φ = 219517781864320.

The previous prime is 221001010120307. The next prime is 221001010120357. The reversal of 221001010120309 is 903021010100122.

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 15073200586084 + 205927809534225 = 3882422^2 + 14350185^2 .

It is a cyclic number.

It is not a de Polignac number, because 221001010120309 - 2¹ = 221001010120307 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 221001010120309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221001010120307) 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, 741614127772 + ... + 741614128069.

It is an arithmetic number, because the mean of its divisors is an integer number (55621059594075).

Almost surely, 2^{221001010120309} is an apocalyptic number.

It is an amenable number.

221001010120309 is a deficient number, since it is larger than the sum of its proper divisors (1483228255991).

221001010120309 is a wasteful number, since it uses less digits than its factorization.

221001010120309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1483228255990.

The product of its (nonzero) digits is 216, while the sum is 22.

The spelling of 221001010120309 in words is "two hundred twenty-one trillion, one billion, ten million, one hundred twenty thousand, three hundred nine".