2010001001221 has 4 divisors (see below), whose sum is σ = 2128236354252. Its totient is φ = 1891765648192.

The previous prime is 2010001001207. The next prime is 2010001001227. The reversal of 2010001001221 is 1221001000102.

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 1057834877121 + 952166124100 = 1028511^2 + 975790^2 .

It is a cyclic number.

It is not a de Polignac number, because 2010001001221 - 2¹⁹ = 2010000476933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2010001001198 and 2010001001207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2010001001227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59117676490 + ... + 59117676523.

It is an arithmetic number, because the mean of its divisors is an integer number (532059088563).

Almost surely, 2^{2010001001221} is an apocalyptic number.

It is an amenable number.

2010001001221 is a deficient number, since it is larger than the sum of its proper divisors (118235353031).

2010001001221 is a wasteful number, since it uses less digits than its factorization.

2010001001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118235353030.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 2010001001221 its reverse (1221001000102), we get a palindrome (3231002001323).

The spelling of 2010001001221 in words is "two trillion, ten billion, one million, one thousand, two hundred twenty-one".