2010001220221 has 4 divisors (see below), whose sum is σ = 2010795375744.
Its totient is φ = 2009207064700.
The previous prime is 2010001220219. The next prime is 2010001220263. The reversal of 2010001220221 is 1220221000102.
Adding to 2010001220221 its reverse (1220221000102), we get a palindrome (3230222220323).
It is a happy number.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.
It is a cyclic number.
It is not a de Polignac number, because 2010001220221 - 21 = 2010001220219 is a prime.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2010001220021) 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, 397073965 + ... + 397079026.
It is an arithmetic number, because the mean of its divisors is an integer number (502698843936).
Almost surely, 22010001220221 is an apocalyptic number.
It is an amenable number.
2010001220221 is a deficient number, since it is larger than the sum of its proper divisors (794155523).
2010001220221 is an equidigital number, since it uses as much as digits as its factorization.
2010001220221 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 794155522.
The product of its (nonzero) digits is 32, while the sum is 13.
The spelling of 2010001220221 in words is "two trillion, ten billion, one million, two hundred twenty thousand, two hundred twenty-one".