2221221020201 has 4 divisors (see below), whose sum is σ = 2221231575552. Its totient is φ = 2221210464852.

The previous prime is 2221221020197. The next prime is 2221221020231. The reversal of 2221221020201 is 1020201221222.

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 2221221020201 - 2² = 2221221020197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2221221020201.

It is not an unprimeable number, because it can be changed into a prime (2221221020231) 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, 4955465 + ... + 5385078.

It is an arithmetic number, because the mean of its divisors is an integer number (555307893888).

Almost surely, 2^{2221221020201} is an apocalyptic number.

It is an amenable number.

2221221020201 is a deficient number, since it is larger than the sum of its proper divisors (10555351).

2221221020201 is a wasteful number, since it uses less digits than its factorization.

2221221020201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10555350.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2221221020201 its reverse (1020201221222), we get a palindrome (3241422241423).

The spelling of 2221221020201 in words is "two trillion, two hundred twenty-one billion, two hundred twenty-one million, twenty thousand, two hundred one".